404055166 has 4 divisors (see below), whose sum is σ = 606082752. Its totient is φ = 202027582.

The previous prime is 404055163. The next prime is 404055203. The reversal of 404055166 is 661550404.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404055163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101013790 + ... + 101013793.

It is an arithmetic number, because the mean of its divisors is an integer number (151520688).

Almost surely, 2^404055166 is an apocalyptic number.

404055166 is a deficient number, since it is larger than the sum of its proper divisors (202027586).

404055166 is a wasteful number, since it uses less digits than its factorization.

404055166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202027585.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 404055166 is about 20101.1235009389. The cubic root of 404055166 is about 739.2878259040.

The spelling of 404055166 in words is "four hundred four million, fifty-five thousand, one hundred sixty-six".