77644676 has 12 divisors (see below), whose sum is σ = 137598720. Its totient is φ = 38330760.

The previous prime is 77644667. The next prime is 77644681. The reversal of 77644676 is 67644677.

It is a super-2 number, since 2×77644676² = 12057391422289952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77644676.

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, 122540 + ... + 123171.

It is an arithmetic number, because the mean of its divisors is an integer number (11466560).

Almost surely, 2^77644676 is an apocalyptic number.

It is an amenable number.

77644676 is a deficient number, since it is larger than the sum of its proper divisors (59954044).

77644676 is a wasteful number, since it uses less digits than its factorization.

77644676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245794 (or 245792 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 47.

The square root of 77644676 is about 8811.6216441697. The cubic root of 77644676 is about 426.6160863977.

Subtracting from 77644676 its reverse (67644677), we obtain a palindrome (9999999).

The spelling of 77644676 in words is "seventy-seven million, six hundred forty-four thousand, six hundred seventy-six".