766690 has 16 divisors (see below), whose sum is σ = 1412928. Its totient is φ = 299376.

The previous prime is 766687. The next prime is 766721. The reversal of 766690 is 96667.

It is a super-2 number, since 2×766690² = 1175627112200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (88308).

2⁷⁶⁶⁶⁹⁰ is an apocalyptic number.

766690 is a deficient number, since it is larger than the sum of its proper divisors (646238).

766690 is a wasteful number, since it uses less digits than its factorization.

766690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 766690 is about 875.6083599418. The cubic root of 766690 is about 91.5250411720.

The spelling of 766690 in words is "seven hundred sixty-six thousand, six hundred ninety".