166640632 has 16 divisors (see below), whose sum is σ = 312614640. Its totient is φ = 83276736.

The previous prime is 166640611. The next prime is 166640651. The reversal of 166640632 is 236046661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15573 + ... + 23995.

It is an arithmetic number, because the mean of its divisors is an integer number (19538415).

Almost surely, 2^166640632 is an apocalyptic number.

It is an amenable number.

166640632 is a deficient number, since it is larger than the sum of its proper divisors (145974008).

166640632 is a wasteful number, since it uses less digits than its factorization.

166640632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10902 (or 10898 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 166640632 is about 12908.9361296739. The cubic root of 166640632 is about 550.2925517985.

The spelling of 166640632 in words is "one hundred sixty-six million, six hundred forty thousand, six hundred thirty-two".