166764404 has 12 divisors (see below), whose sum is σ = 291962244. Its totient is φ = 83346624.

The previous prime is 166764397. The next prime is 166764419. The reversal of 166764404 is 404467661.

It can be written as a sum of positive squares in 2 ways, for example, as 71740900 + 95023504 = 8470^2 + 9748^2 .

It is a super-3 number, since 3×166764404³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602 + ... + 18614.

It is an arithmetic number, because the mean of its divisors is an integer number (24330187).

Almost surely, 2^166764404 is an apocalyptic number.

It is an amenable number.

166764404 is a deficient number, since it is larger than the sum of its proper divisors (125197840).

166764404 is a wasteful number, since it uses less digits than its factorization.

166764404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17794 (or 17792 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 166764404 is about 12913.7292832086. The cubic root of 166764404 is about 550.4287609827.

The spelling of 166764404 in words is "one hundred sixty-six million, seven hundred sixty-four thousand, four hundred four".