77706464 has 24 divisors (see below), whose sum is σ = 166893048. Its totient is φ = 35320960.

The previous prime is 77706437. The next prime is 77706467. The reversal of 77706464 is 46460777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77706467) by changing a digit.

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, 110027 + ... + 110730.

It is an arithmetic number, because the mean of its divisors is an integer number (6953877).

Almost surely, 2^77706464 is an apocalyptic number.

It is an amenable number.

77706464 is an abundant number, since it is smaller than the sum of its proper divisors (89186584).

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

77706464 is a wasteful number, since it uses less digits than its factorization.

77706464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220778 (or 220770 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 77706464 is about 8815.1269985179. The cubic root of 77706464 is about 426.7292204292.

The spelling of 77706464 in words is "seventy-seven million, seven hundred six thousand, four hundred sixty-four".