66116633 has 4 divisors (see below), whose sum is σ = 72127248. Its totient is φ = 60106020.

The previous prime is 66116629. The next prime is 66116647. The reversal of 66116633 is 33661166.

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.

It is a cyclic number.

It is not a de Polignac number, because 66116633 - 2² = 66116629 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66116633.

It is not an unprimeable number, because it can be changed into a prime (66116623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3005291 + ... + 3005312.

It is an arithmetic number, because the mean of its divisors is an integer number (18031812).

Almost surely, 2^66116633 is an apocalyptic number.

It is an amenable number.

66116633 is a deficient number, since it is larger than the sum of its proper divisors (6010615).

66116633 is a wasteful number, since it uses less digits than its factorization.

66116633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010614.

The product of its digits is 11664, while the sum is 32.

The square root of 66116633 is about 8131.2135010710. The cubic root of 66116633 is about 404.3619134627.

Adding to 66116633 its reverse (33661166), we get a palindrome (99777799).

The spelling of 66116633 in words is "sixty-six million, one hundred sixteen thousand, six hundred thirty-three".