766944064 has 14 divisors (see below), whose sum is σ = 1521904754. Its totient is φ = 383472000.

The previous prime is 766944019. The next prime is 766944067. The reversal of 766944064 is 460449667.

It can be written as a sum of positive squares in only one way, i.e., 735494400 + 31449664 = 27120^2 + 5608^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766944067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5991687 + ... + 5991814.

Almost surely, 2^766944064 is an apocalyptic number.

It is an amenable number.

766944064 is a deficient number, since it is larger than the sum of its proper divisors (754960690).

766944064 is a wasteful number, since it uses less digits than its factorization.

766944064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11983513 (or 11983503 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The square root of 766944064 is about 27693.7549638903. The cubic root of 766944064 is about 915.3514984258.

The spelling of 766944064 in words is "seven hundred sixty-six million, nine hundred forty-four thousand, sixty-four".