66901469 has 4 divisors (see below), whose sum is σ = 67162044. Its totient is φ = 66640896.

The previous prime is 66901391. The next prime is 66901481. The reversal of 66901469 is 96410966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38278969 + 28622500 = 6187^2 + 5350^2 .

It is a cyclic number.

It is not a de Polignac number, because 66901469 - 2¹⁶ = 66835933 is a prime.

It is a super-2 number, since 2×66901469² = 8951613108715922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66901169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129902 + ... + 130415.

It is an arithmetic number, because the mean of its divisors is an integer number (16790511).

Almost surely, 2^66901469 is an apocalyptic number.

It is an amenable number.

66901469 is a deficient number, since it is larger than the sum of its proper divisors (260575).

66901469 is a wasteful number, since it uses less digits than its factorization.

66901469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260574.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 66901469 is about 8179.3318186757. The cubic root of 66901469 is about 405.9556136614.

The spelling of 66901469 in words is "sixty-six million, nine hundred one thousand, four hundred sixty-nine".