766664 has 16 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 374992.

The previous prime is 766651. The next prime is 766679. The reversal of 766664 is 466667.

766664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is an unprimeable number.

766664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644 + ... + 1395.

It is an arithmetic number, because the mean of its divisors is an integer number (91800).

2⁷⁶⁶⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

766664 is a deficient number, since it is larger than the sum of its proper divisors (702136).

766664 is a wasteful number, since it uses less digits than its factorization.

766664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092 (or 2088 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 766664 is about 875.5935129956. The cubic root of 766664 is about 91.5240065609.

The spelling of 766664 in words is "seven hundred sixty-six thousand, six hundred sixty-four".