666807044 has 36 divisors (see below), whose sum is σ = 1206463104. Its totient is φ = 322461216.

The previous prime is 666807019. The next prime is 666807059. The reversal of 666807044 is 440708666.

It is a junction number, because it is equal to n+sod(n) for n = 666806992 and 666807010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1439957 + ... + 1440419.

It is an arithmetic number, because the mean of its divisors is an integer number (33512864).

Almost surely, 2^666807044 is an apocalyptic number.

It is an amenable number.

666807044 is a deficient number, since it is larger than the sum of its proper divisors (539656060).

666807044 is a wasteful number, since it uses less digits than its factorization.

666807044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 666807044 is about 25822.6072270017. The cubic root of 666807044 is about 873.6417758812.

The spelling of 666807044 in words is "six hundred sixty-six million, eight hundred seven thousand, forty-four".