166728679936 has 160 divisors (see below), whose sum is σ = 434128464000. Its totient is φ = 62078386176.

The previous prime is 166728679933. The next prime is 166728679951. The reversal of 166728679936 is 639976827661.

It is a super-2 number, since 2×166728679936² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166728679933) 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, 686815 + ... + 897313.

It is an arithmetic number, because the mean of its divisors is an integer number (2713302900).

Almost surely, 2^166728679936 is an apocalyptic number.

166728679936 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 166728679936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217064232000).

166728679936 is an abundant number, since it is smaller than the sum of its proper divisors (267399784064).

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

166728679936 is a wasteful number, since it uses less digits than its factorization.

166728679936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210554 (or 210538 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 70.

The spelling of 166728679936 in words is "one hundred sixty-six billion, seven hundred twenty-eight million, six hundred seventy-nine thousand, nine hundred thirty-six".