404307666 has 32 divisors (see below), whose sum is σ = 1026814080. Its totient is φ = 115516368.

The previous prime is 404307649. The next prime is 404307671. The reversal of 404307666 is 666703404.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 404307666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534421 + ... + 535176.

It is an arithmetic number, because the mean of its divisors is an integer number (32087940).

Almost surely, 2^404307666 is an apocalyptic number.

404307666 is an abundant number, since it is smaller than the sum of its proper divisors (622506414).

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

404307666 is a wasteful number, since it uses less digits than its factorization.

404307666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069615 (or 1069609 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 404307666 is about 20107.4032634749. The cubic root of 404307666 is about 739.4417911056.

The spelling of 404307666 in words is "four hundred four million, three hundred seven thousand, six hundred sixty-six".