766646 has 16 divisors (see below), whose sum is σ = 1198800. Its totient is φ = 367488.

The previous prime is 766639. The next prime is 766651. The reversal of 766646 is 646667.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 766646.

It is an unprimeable number.

766646 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 7 ways as a sum of consecutive naturals, for example, 8570 + ... + 8658.

It is an arithmetic number, because the mean of its divisors is an integer number (74925).

2⁷⁶⁶⁶⁴⁶ is an apocalyptic number.

766646 is a deficient number, since it is larger than the sum of its proper divisors (432154).

766646 is a wasteful number, since it uses less digits than its factorization.

766646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223.

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

The square root of 766646 is about 875.5832341931. The cubic root of 766646 is about 91.5232902779.

The spelling of 766646 in words is "seven hundred sixty-six thousand, six hundred forty-six".