766839664 has 20 divisors (see below), whose sum is σ = 1502448480. Its totient is φ = 379111040.

The previous prime is 766839659. The next prime is 766839673. The reversal of 766839664 is 466938667.

766839664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 267832 + ... + 270679.

It is an arithmetic number, because the mean of its divisors is an integer number (75122424).

Almost surely, 2^766839664 is an apocalyptic number.

It is an amenable number.

766839664 is a deficient number, since it is larger than the sum of its proper divisors (735608816).

766839664 is a wasteful number, since it uses less digits than its factorization.

766839664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538608 (or 538602 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The square root of 766839664 is about 27691.8699982504. The cubic root of 766839664 is about 915.3099625706.

The spelling of 766839664 in words is "seven hundred sixty-six million, eight hundred thirty-nine thousand, six hundred sixty-four".