786664880 has 20 divisors (see below), whose sum is σ = 1828996032. Its totient is φ = 314665920.

The previous prime is 786664841. The next prime is 786664891. The reversal of 786664880 is 88466687.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4916576 + ... + 4916735.

Almost surely, 2^786664880 is an apocalyptic number.

It is an amenable number.

786664880 is an abundant number, since it is smaller than the sum of its proper divisors (1042331152).

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

786664880 is a wasteful number, since it uses less digits than its factorization.

786664880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9833324 (or 9833318 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The square root of 786664880 is about 28047.5467732920. The cubic root of 786664880 is about 923.1308268664.

The spelling of 786664880 in words is "seven hundred eighty-six million, six hundred sixty-four thousand, eight hundred eighty".