79787660 has 12 divisors (see below), whose sum is σ = 167554128. Its totient is φ = 31915056.

The previous prime is 79787633. The next prime is 79787663. The reversal of 79787660 is 6678797.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 79787599 and 79787608.

It is not an unprimeable number, because it can be changed into a prime (79787663) 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, 1994672 + ... + 1994711.

It is an arithmetic number, because the mean of its divisors is an integer number (13962844).

Almost surely, 2^79787660 is an apocalyptic number.

It is an amenable number.

79787660 is an abundant number, since it is smaller than the sum of its proper divisors (87766468).

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

79787660 is a wasteful number, since it uses less digits than its factorization.

79787660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989392 (or 3989390 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 79787660 is about 8932.3938560724. The cubic root of 79787660 is about 430.5053729989.

The spelling of 79787660 in words is "seventy-nine million, seven hundred eighty-seven thousand, six hundred sixty".