166929944979 has 24 divisors (see below), whose sum is σ = 264420523008. Its totient is φ = 93358992720.

The previous prime is 166929944957. The next prime is 166929944983. The reversal of 166929944979 is 979449929661.

It is a happy number.

It is not a de Polignac number, because 166929944979 - 2⁵ = 166929944947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166929944979.

It is not an unprimeable number, because it can be changed into a prime (166929944999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12073707 + ... + 12087524.

It is an arithmetic number, because the mean of its divisors is an integer number (11017521792).

Almost surely, 2^166929944979 is an apocalyptic number.

166929944979 is a deficient number, since it is larger than the sum of its proper divisors (97490578029).

166929944979 is a wasteful number, since it uses less digits than its factorization.

166929944979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24161295 (or 24161288 counting only the distinct ones).

The product of its digits is 476171136, while the sum is 75.

The spelling of 166929944979 in words is "one hundred sixty-six billion, nine hundred twenty-nine million, nine hundred forty-four thousand, nine hundred seventy-nine".