79666677 has 12 divisors (see below), whose sum is σ = 121130880. Its totient is φ = 50315688.

The previous prime is 79666669. The next prime is 79666703. The reversal of 79666677 is 77666697.

It is not a de Polignac number, because 79666677 - 2³ = 79666669 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79666177) 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 11 ways as a sum of consecutive naturals, for example, 232773 + ... + 233114.

It is an arithmetic number, because the mean of its divisors is an integer number (10094240).

Almost surely, 2^79666677 is an apocalyptic number.

It is an amenable number.

79666677 is a deficient number, since it is larger than the sum of its proper divisors (41464203).

79666677 is a wasteful number, since it uses less digits than its factorization.

79666677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465912 (or 465909 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 54.

The square root of 79666677 is about 8925.6191381887. The cubic root of 79666677 is about 430.2876694140.

The spelling of 79666677 in words is "seventy-nine million, six hundred sixty-six thousand, six hundred seventy-seven".