77999672 has 16 divisors (see below), whose sum is σ = 154852560. Its totient is φ = 36705664.

The previous prime is 77999659. The next prime is 77999687. The reversal of 77999672 is 27699977.

It is a congruent number.

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, 286628 + ... + 286899.

It is an arithmetic number, because the mean of its divisors is an integer number (9678285).

Almost surely, 2^77999672 is an apocalyptic number.

It is an amenable number.

77999672 is a deficient number, since it is larger than the sum of its proper divisors (76852888).

77999672 is a wasteful number, since it uses less digits than its factorization.

77999672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573550 (or 573546 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 56.

The square root of 77999672 is about 8831.7422969650. The cubic root of 77999672 is about 427.2652692664.

It can be divided in two parts, 7799 and 9672, that added together give a palindrome (17471).

The spelling of 77999672 in words is "seventy-seven million, nine hundred ninety-nine thousand, six hundred seventy-two".