166744657664 has 36 divisors (see below), whose sum is σ = 358440896856. Its totient is φ = 76959071232.

The previous prime is 166744657663. The next prime is 166744657687. The reversal of 166744657664 is 466756447661.

It is a junction number, because it is equal to n+sod(n) for n = 166744657597 and 166744657606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166744657661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25048454 + ... + 25055109.

Almost surely, 2^166744657664 is an apocalyptic number.

It is an amenable number.

166744657664 is an abundant number, since it is smaller than the sum of its proper divisors (191696239192).

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

166744657664 is an equidigital number, since it uses as much as digits as its factorization.

166744657664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50103592 (or 50103578 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 62.

The spelling of 166744657664 in words is "one hundred sixty-six billion, seven hundred forty-four million, six hundred fifty-seven thousand, six hundred sixty-four".