166157557172576 has 192 divisors, whose sum is σ = 360996352516800. Its totient is φ = 74959234596864.

The previous prime is 166157557172569. The next prime is 166157557172603. The reversal of 166157557172576 is 675271755751661.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 392505860 + ... + 392928956.

It is an arithmetic number, because the mean of its divisors is an integer number (1880189336025).

Almost surely, 2^{166157557172576} is an apocalyptic number.

166157557172576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166157557172576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180498176258400).

166157557172576 is an abundant number, since it is smaller than the sum of its proper divisors (194838795344224).

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

166157557172576 is a wasteful number, since it uses less digits than its factorization.

166157557172576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423449 (or 423441 counting only the distinct ones).

The product of its digits is 648270000, while the sum is 71.

The spelling of 166157557172576 in words is "one hundred sixty-six trillion, one hundred fifty-seven billion, five hundred fifty-seven million, one hundred seventy-two thousand, five hundred seventy-six".