77776064 has 28 divisors (see below), whose sum is σ = 161050224. Its totient is φ = 37196544.

The previous prime is 77776043. The next prime is 77776067. The reversal of 77776064 is 46067777.

It is a super-2 number, since 2×77776064² = 12098232262664192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77776067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24947 + ... + 27890.

Almost surely, 2^77776064 is an apocalyptic number.

It is an amenable number.

77776064 is an abundant number, since it is smaller than the sum of its proper divisors (83274160).

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

77776064 is a wasteful number, since it uses less digits than its factorization.

77776064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52872 (or 52862 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 44.

The square root of 77776064 is about 8819.0738742795. The cubic root of 77776064 is about 426.8565864564.

The spelling of 77776064 in words is "seventy-seven million, seven hundred seventy-six thousand, sixty-four".