166833720372 has 24 divisors (see below), whose sum is σ = 424667652192. Its totient is φ = 50555672800.

The previous prime is 166833720367. The next prime is 166833720373. The reversal of 166833720372 is 273027338661.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166833720373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631945779 + ... + 631946042.

It is an arithmetic number, because the mean of its divisors is an integer number (17694485508).

Almost surely, 2^166833720372 is an apocalyptic number.

166833720372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166833720372 is an abundant number, since it is smaller than the sum of its proper divisors (257833931820).

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

166833720372 is a wasteful number, since it uses less digits than its factorization.

166833720372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263891839 (or 1263891837 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 166833720372 in words is "one hundred sixty-six billion, eight hundred thirty-three million, seven hundred twenty thousand, three hundred seventy-two".