77872664 has 16 divisors (see below), whose sum is σ = 152359920. Its totient is φ = 37243360.

The previous prime is 77872657. The next prime is 77872681. The reversal of 77872664 is 46627877.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 211427 + ... + 211794.

It is an arithmetic number, because the mean of its divisors is an integer number (9522495).

Almost surely, 2^77872664 is an apocalyptic number.

It is an amenable number.

77872664 is a deficient number, since it is larger than the sum of its proper divisors (74487256).

77872664 is a wasteful number, since it uses less digits than its factorization.

77872664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423250 (or 423246 counting only the distinct ones).

The product of its digits is 790272, while the sum is 47.

The square root of 77872664 is about 8824.5489403142. The cubic root of 77872664 is about 427.0332358629.

The spelling of 77872664 in words is "seventy-seven million, eight hundred seventy-two thousand, six hundred sixty-four".