77064856 has 32 divisors (see below), whose sum is σ = 160315200. Its totient is φ = 34433440.

The previous prime is 77064839. The next prime is 77064857. The reversal of 77064856 is 65846077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77064857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230 + ... + 12613.

It is an arithmetic number, because the mean of its divisors is an integer number (5009850).

Almost surely, 2^77064856 is an apocalyptic number.

It is an amenable number.

77064856 is an abundant number, since it is smaller than the sum of its proper divisors (83250344).

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

77064856 is a wasteful number, since it uses less digits than its factorization.

77064856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14919 (or 14915 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 77064856 is about 8778.6591231235. The cubic root of 77064856 is about 425.5514981145.

The spelling of 77064856 in words is "seventy-seven million, sixty-four thousand, eight hundred fifty-six".