404466660 has 72 divisors (see below), whose sum is σ = 1321265400. Its totient is φ = 99560448.

The previous prime is 404466619. The next prime is 404466709. The reversal of 404466660 is 66664404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2143296 + 402323364 = 1464^2 + 20058^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84085 + ... + 88764.

Almost surely, 2^404466660 is an apocalyptic number.

It is an amenable number.

404466660 is an abundant number, since it is smaller than the sum of its proper divisors (916798740).

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

404466660 is a wasteful number, since it uses less digits than its factorization.

404466660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172877 (or 172872 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 404466660 is about 20111.3564932851. The cubic root of 404466660 is about 739.5387069037.

The spelling of 404466660 in words is "four hundred four million, four hundred sixty-six thousand, six hundred sixty".