79800660 has 48 divisors (see below), whose sum is σ = 248270400. Its totient is φ = 21280032.

The previous prime is 79800641. The next prime is 79800661. The reversal of 79800660 is 6600897.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79800661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73350 + ... + 74429.

It is an arithmetic number, because the mean of its divisors is an integer number (5172300).

Almost surely, 2^79800660 is an apocalyptic number.

It is an amenable number.

79800660 is an abundant number, since it is smaller than the sum of its proper divisors (168469740).

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

79800660 is a wasteful number, since it uses less digits than its factorization.

79800660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147797 (or 147789 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 79800660 is about 8933.1215149017. The cubic root of 79800660 is about 430.5287528295.

The spelling of 79800660 in words is "seventy-nine million, eight hundred thousand, six hundred sixty".