166669799472 has 80 divisors (see below), whose sum is σ = 521895346560. Its totient is φ = 50505998400.

The previous prime is 166669799447. The next prime is 166669799473. The reversal of 166669799472 is 274997966661.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 166669799472.

It is not an unprimeable number, because it can be changed into a prime (166669799473) 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, 17532054 + ... + 17541557.

It is an arithmetic number, because the mean of its divisors is an integer number (6523691832).

Almost surely, 2^166669799472 is an apocalyptic number.

166669799472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166669799472 is an abundant number, since it is smaller than the sum of its proper divisors (355225547088).

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

166669799472 is a wasteful number, since it uses less digits than its factorization.

166669799472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35073639 (or 35073627 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 72.

The spelling of 166669799472 in words is "one hundred sixty-six billion, six hundred sixty-nine million, seven hundred ninety-nine thousand, four hundred seventy-two".