166600071522 has 12 divisors (see below), whose sum is σ = 360966821670. Its totient is φ = 55533357168.

The previous prime is 166600071509. The next prime is 166600071557. The reversal of 166600071522 is 225170006661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 166520308761 + 79762761 = 408069^2 + 8931^2 .

It is a super-2 number, since 2×166600071522² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4627779747 + ... + 4627779782.

Almost surely, 2^166600071522 is an apocalyptic number.

166600071522 is an abundant number, since it is smaller than the sum of its proper divisors (194366750148).

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

166600071522 is a wasteful number, since it uses less digits than its factorization.

166600071522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9255559537 (or 9255559534 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 166600071522 in words is "one hundred sixty-six billion, six hundred million, seventy-one thousand, five hundred twenty-two".