79220664 has 48 divisors (see below), whose sum is σ = 217591920. Its totient is φ = 26033280.

The previous prime is 79220641. The next prime is 79220677. The reversal of 79220664 is 46602297.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2637 + ... + 12860.

It is an arithmetic number, because the mean of its divisors is an integer number (4533165).

Almost surely, 2^79220664 is an apocalyptic number.

It is an amenable number.

79220664 is an abundant number, since it is smaller than the sum of its proper divisors (138371256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79220664 is a wasteful number, since it uses less digits than its factorization.

79220664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15580 (or 15573 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 79220664 is about 8900.5990809608. The cubic root of 79220664 is about 429.4831793301.

The spelling of 79220664 in words is "seventy-nine million, two hundred twenty thousand, six hundred sixty-four".