166855171748 has 24 divisors (see below), whose sum is σ = 302961804600. Its totient is φ = 80311730688.

The previous prime is 166855171729. The next prime is 166855171753. The reversal of 166855171748 is 847171558661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21143486464 + 145711685284 = 145408^2 + 381722^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2095043 + ... + 2173226.

It is an arithmetic number, because the mean of its divisors is an integer number (12623408525).

Almost surely, 2^166855171748 is an apocalyptic number.

It is an amenable number.

166855171748 is a deficient number, since it is larger than the sum of its proper divisors (136106632852).

166855171748 is a wasteful number, since it uses less digits than its factorization.

166855171748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268639 (or 4268637 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 59.

The spelling of 166855171748 in words is "one hundred sixty-six billion, eight hundred fifty-five million, one hundred seventy-one thousand, seven hundred forty-eight".