404253666 has 40 divisors (see below), whose sum is σ = 907960284. Its totient is φ = 134434080.

The previous prime is 404253643. The next prime is 404253667. The reversal of 404253666 is 666352404.

It can be written as a sum of positive squares in 2 ways, for example, as 381069441 + 23184225 = 19521^2 + 4815^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404253666.

It is not an unprimeable number, because it can be changed into a prime (404253667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71976 + ... + 77388.

Almost surely, 2^404253666 is an apocalyptic number.

404253666 is an abundant number, since it is smaller than the sum of its proper divisors (503706618).

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

404253666 is a wasteful number, since it uses less digits than its factorization.

404253666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888 (or 5879 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 404253666 is about 20106.0604296317. The cubic root of 404253666 is about 739.4088692840.

The spelling of 404253666 in words is "four hundred four million, two hundred fifty-three thousand, six hundred sixty-six".