166990408 has 16 divisors (see below), whose sum is σ = 337192380. Its totient is φ = 77072448.

The previous prime is 166990393. The next prime is 166990423. The reversal of 166990408 is 804099661.

166990408 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (166990393) and next prime (166990423).

It can be written as a sum of positive squares in 2 ways, for example, as 165945924 + 1044484 = 12882^2 + 1022^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802735 + ... + 802942.

Almost surely, 2^166990408 is an apocalyptic number.

It is an amenable number.

166990408 is an abundant number, since it is smaller than the sum of its proper divisors (170201972).

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

166990408 is a wasteful number, since it uses less digits than its factorization.

166990408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605696 (or 1605692 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 166990408 is about 12922.4768523685. The cubic root of 166990408 is about 550.6773011279.

The spelling of 166990408 in words is "one hundred sixty-six million, nine hundred ninety thousand, four hundred eight".