666000766 has 4 divisors (see below), whose sum is σ = 999001152. Its totient is φ = 333000382.

The previous prime is 666000737. The next prime is 666000779. The reversal of 666000766 is 667000666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166500190 + ... + 166500193.

It is an arithmetic number, because the mean of its divisors is an integer number (249750288).

Almost surely, 2^666000766 is an apocalyptic number.

666000766 is a deficient number, since it is larger than the sum of its proper divisors (333000386).

666000766 is a wasteful number, since it uses less digits than its factorization.

666000766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333000385.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 666000766 is about 25806.9906420722. The cubic root of 666000766 is about 873.2895089340.

The spelling of 666000766 in words is "six hundred sixty-six million, seven hundred sixty-six", and thus it is an aban number.