166721146536 has 64 divisors (see below), whose sum is σ = 477972028800. Its totient is φ = 47472023808.

The previous prime is 166721146499. The next prime is 166721146547. The reversal of 166721146536 is 635641127661.

166721146536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1644271 + ... + 1742718.

It is an arithmetic number, because the mean of its divisors is an integer number (7468312950).

Almost surely, 2^166721146536 is an apocalyptic number.

It is an amenable number.

166721146536 is an abundant number, since it is smaller than the sum of its proper divisors (311250882264).

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

166721146536 is a wasteful number, since it uses less digits than its factorization.

166721146536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387298 (or 3387294 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The spelling of 166721146536 in words is "one hundred sixty-six billion, seven hundred twenty-one million, one hundred forty-six thousand, five hundred thirty-six".