166815790016 has 28 divisors (see below), whose sum is σ = 338068176288. Its totient is φ = 81633257472.

The previous prime is 166815789997. The next prime is 166815790021. The reversal of 166815790016 is 610097518661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27725681 + ... + 27731696.

Almost surely, 2^166815790016 is an apocalyptic number.

166815790016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166815790016 is an abundant number, since it is smaller than the sum of its proper divisors (171252386272).

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

166815790016 is an equidigital number, since it uses as much as digits as its factorization.

166815790016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55457436 (or 55457426 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 166815790016 in words is "one hundred sixty-six billion, eight hundred fifteen million, seven hundred ninety thousand, sixteen".