Search a number
-
+
66996737 = 151443687
BaseRepresentation
bin1111111110010…
…0101000000001
311200001210020122
43333210220001
5114122343422
610351550025
71442314523
oct377445001
9150053218
1066996737
11348aa705
121a52b315
1310b59852
148c7da13
155d35d42
hex3fe4a01

66996737 has 4 divisors (see below), whose sum is σ = 67440576. Its totient is φ = 66552900.

The previous prime is 66996731. The next prime is 66996773. The reversal of 66996737 is 73769966.

66996737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73769966 = 236884983.

It is a cyclic number.

It is not a de Polignac number, because 66996737 - 28 = 66996481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66996731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221693 + ... + 221994.

It is an arithmetic number, because the mean of its divisors is an integer number (16860144).

Almost surely, 266996737 is an apocalyptic number.

It is an amenable number.

66996737 is a deficient number, since it is larger than the sum of its proper divisors (443839).

66996737 is a wasteful number, since it uses less digits than its factorization.

66996737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443838.

The product of its digits is 2571912, while the sum is 53.

The square root of 66996737 is about 8185.1534499971. The cubic root of 66996737 is about 406.1482164890.

The spelling of 66996737 in words is "sixty-six million, nine hundred ninety-six thousand, seven hundred thirty-seven".

Divisors: 1 151 443687 66996737