786664 has 16 divisors (see below), whose sum is σ = 1490400. Its totient is φ = 389232.

The previous prime is 786661. The next prime is 786673. The reversal of 786664 is 466687.

It is not an unprimeable number, because it can be changed into a prime (786661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (93150).

2⁷⁸⁶⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

786664 is a deficient number, since it is larger than the sum of its proper divisors (703736).

786664 is a wasteful number, since it uses less digits than its factorization.

786664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1028 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 786664 is about 886.9408097500. The cubic root of 786664 is about 92.3130482647.

The spelling of 786664 in words is "seven hundred eighty-six thousand, six hundred sixty-four".