166400432 has 20 divisors (see below), whose sum is σ = 351710376. Its totient is φ = 75636480.

The previous prime is 166400431. The next prime is 166400459. The reversal of 166400432 is 234004661.

It is not an unprimeable number, because it can be changed into a prime (166400431) 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 in 3 ways as a sum of consecutive naturals, for example, 472553 + ... + 472904.

Almost surely, 2^166400432 is an apocalyptic number.

It is an amenable number.

166400432 is an abundant number, since it is smaller than the sum of its proper divisors (185309944).

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

166400432 is a wasteful number, since it uses less digits than its factorization.

166400432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945476 (or 945470 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 166400432 is about 12899.6291419560. The cubic root of 166400432 is about 550.0280228146.

The spelling of 166400432 in words is "one hundred sixty-six million, four hundred thousand, four hundred thirty-two".