766866 has 16 divisors (see below), whose sum is σ = 1600704. Its totient is φ = 244464.

The previous prime is 766861. The next prime is 766867. The reversal of 766866 is 668667.

It is not an unprimeable number, because it can be changed into a prime (766861) by changing a digit.

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, 2641 + ... + 2916.

It is an arithmetic number, because the mean of its divisors is an integer number (100044).

2⁷⁶⁶⁸⁶⁶ is an apocalyptic number.

766866 is an abundant number, since it is smaller than the sum of its proper divisors (833838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766866 is a wasteful number, since it uses less digits than its factorization.

766866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5585.

The product of its digits is 72576, while the sum is 39.

The square root of 766866 is about 875.7088557277. The cubic root of 766866 is about 91.5320440783.

The spelling of 766866 in words is "seven hundred sixty-six thousand, eight hundred sixty-six".