165920679936 has 336 divisors, whose sum is σ = 542686042080. Its totient is φ = 50274017280.

The previous prime is 165920679919. The next prime is 165920679959. The reversal of 165920679936 is 639976029561.

165920679936 is a `hidden beast` number, since 1 + 6 + 592 + 0 + 6 + 7 + 9 + 9 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 16417861 + ... + 16427963.

It is an arithmetic number, because the mean of its divisors is an integer number (1615137030).

Almost surely, 2^165920679936 is an apocalyptic number.

165920679936 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 165920679936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271343021040).

165920679936 is an abundant number, since it is smaller than the sum of its proper divisors (376765362144).

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

165920679936 is an equidigital number, since it uses as much as digits as its factorization.

165920679936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154 (or 10119 counting only the distinct ones).

The product of its (nonzero) digits is 33067440, while the sum is 63.

The spelling of 165920679936 in words is "one hundred sixty-five billion, nine hundred twenty million, six hundred seventy-nine thousand, nine hundred thirty-six".