166904404 has 6 divisors (see below), whose sum is σ = 292082714. Its totient is φ = 83452200.

The previous prime is 166904383. The next prime is 166904407. The reversal of 166904404 is 404409661.

It can be written as a sum of positive squares in only one way, i.e., 133864900 + 33039504 = 11570^2 + 5748^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166904404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166904407) 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 as a sum of consecutive naturals, namely, 20863047 + ... + 20863054.

Almost surely, 2^166904404 is an apocalyptic number.

It is an amenable number.

166904404 is a deficient number, since it is larger than the sum of its proper divisors (125178310).

166904404 is a wasteful number, since it uses less digits than its factorization.

166904404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41726105 (or 41726103 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 166904404 is about 12919.1487335660. The cubic root of 166904404 is about 550.5827476261.

The spelling of 166904404 in words is "one hundred sixty-six million, nine hundred four thousand, four hundred four".