166203961632 has 72 divisors (see below), whose sum is σ = 497518454160. Its totient is φ = 52485459840.

The previous prime is 166203961621. The next prime is 166203961643. The reversal of 166203961632 is 236169302661.

166203961632 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 0 + 3 + 9 + 6 + 1 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (166203961621) and next prime (166203961643).

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15181294 + ... + 15192237.

It is an arithmetic number, because the mean of its divisors is an integer number (6909978530).

Almost surely, 2^166203961632 is an apocalyptic number.

166203961632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166203961632 is an abundant number, since it is smaller than the sum of its proper divisors (331314492528).

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

166203961632 is a wasteful number, since it uses less digits than its factorization.

166203961632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30373566 (or 30373555 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 166203961632 in words is "one hundred sixty-six billion, two hundred three million, nine hundred sixty-one thousand, six hundred thirty-two".