79665057 has 24 divisors (see below), whose sum is σ = 117112320. Its totient is φ = 52176960.

The previous prime is 79665023. The next prime is 79665083. The reversal of 79665057 is 75056697.

It is a happy number.

It is not a de Polignac number, because 79665057 - 2¹⁰ = 79664033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79665007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216888 + ... + 217254.

It is an arithmetic number, because the mean of its divisors is an integer number (4879680).

Almost surely, 2^79665057 is an apocalyptic number.

It is an amenable number.

79665057 is a deficient number, since it is larger than the sum of its proper divisors (37447263).

79665057 is a wasteful number, since it uses less digits than its factorization.

79665057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The square root of 79665057 is about 8925.5283877202. The cubic root of 79665057 is about 430.2847528003.

The spelling of 79665057 in words is "seventy-nine million, six hundred sixty-five thousand, fifty-seven".