166404276 has 36 divisors (see below), whose sum is σ = 424978372. Its totient is φ = 54895104.

The previous prime is 166404269. The next prime is 166404289. The reversal of 166404276 is 672404661.

166404276 is a `hidden beast` number, since 1 + 6 + 640 + 4 + 2 + 7 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63584676 + 102819600 = 7974^2 + 10140^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 166404276.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 20335 + ... + 27318.

Almost surely, 2^166404276 is an apocalyptic number.

It is an amenable number.

166404276 is an abundant number, since it is smaller than the sum of its proper divisors (258574096).

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

166404276 is a wasteful number, since it uses less digits than its factorization.

166404276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47760 (or 47755 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 166404276 is about 12899.7781376270. The cubic root of 166404276 is about 550.0322581631.

The spelling of 166404276 in words is "one hundred sixty-six million, four hundred four thousand, two hundred seventy-six".