166531322952 has 128 divisors (see below), whose sum is σ = 473770704000. Its totient is φ = 54170726400.

The previous prime is 166531322899. The next prime is 166531322989. The reversal of 166531322952 is 259223135661.

166531322952 is a `hidden beast` number, since 1 + 6 + 6 + 531 + 3 + 22 + 95 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 166531322898 and 166531322907.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11147424 + ... + 11162352.

It is an arithmetic number, because the mean of its divisors is an integer number (3701333625).

Almost surely, 2^166531322952 is an apocalyptic number.

166531322952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166531322952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236885352000).

166531322952 is an abundant number, since it is smaller than the sum of its proper divisors (307239381048).

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

166531322952 is a wasteful number, since it uses less digits than its factorization.

166531322952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16188 (or 16178 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The spelling of 166531322952 in words is "one hundred sixty-six billion, five hundred thirty-one million, three hundred twenty-two thousand, nine hundred fifty-two".