772693664 has 24 divisors (see below), whose sum is σ = 1521998100. Its totient is φ = 386154496.

The previous prime is 772693657. The next prime is 772693679. The reversal of 772693664 is 466396277.

It can be written as a sum of positive squares in 2 ways, for example, as 551874064 + 220819600 = 23492^2 + 14860^2 .

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, 76832 + ... + 86304.

Almost surely, 2^772693664 is an apocalyptic number.

It is an amenable number.

772693664 is a deficient number, since it is larger than the sum of its proper divisors (749304436).

772693664 is a wasteful number, since it uses less digits than its factorization.

772693664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12032 (or 12024 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 50.

The square root of 772693664 is about 27797.3679329537. The cubic root of 772693664 is about 917.6331980245.

The spelling of 772693664 in words is "seven hundred seventy-two million, six hundred ninety-three thousand, six hundred sixty-four".