766986664 has 32 divisors (see below), whose sum is σ = 1489687200. Its totient is φ = 369772480.

The previous prime is 766986613. The next prime is 766986673. The reversal of 766986664 is 466689667.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a junction number, because it is equal to n+sod(n) for n = 766986599 and 766986608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217959 + ... + 221449.

It is an arithmetic number, because the mean of its divisors is an integer number (46552725).

Almost surely, 2^766986664 is an apocalyptic number.

It is an amenable number.

766986664 is a deficient number, since it is larger than the sum of its proper divisors (722700536).

766986664 is a wasteful number, since it uses less digits than its factorization.

766986664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473 (or 4469 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 58.

The square root of 766986664 is about 27694.5240796804. The cubic root of 766986664 is about 915.3684458816.

The spelling of 766986664 in words is "seven hundred sixty-six million, nine hundred eighty-six thousand, six hundred sixty-four".