166659956382 has 32 divisors (see below), whose sum is σ = 354700512000. Its totient is φ = 52022729088.

The previous prime is 166659956339. The next prime is 166659956383. The reversal of 166659956382 is 283659956661.

It is a super-2 number, since 2×166659956382² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166659956383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4085032 + ... + 4125627.

It is an arithmetic number, because the mean of its divisors is an integer number (11084391000).

Almost surely, 2^166659956382 is an apocalyptic number.

166659956382 is an abundant number, since it is smaller than the sum of its proper divisors (188040555618).

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

166659956382 is a wasteful number, since it uses less digits than its factorization.

166659956382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8210880.

The product of its digits is 125971200, while the sum is 66.

The spelling of 166659956382 in words is "one hundred sixty-six billion, six hundred fifty-nine million, nine hundred fifty-six thousand, three hundred eighty-two".