165990751080 has 512 divisors, whose sum is σ = 654912000000. Its totient is φ = 32606945280.

The previous prime is 165990751079. The next prime is 165990751097. The reversal of 165990751080 is 80157099561.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 132898296 + ... + 132899544.

It is an arithmetic number, because the mean of its divisors is an integer number (1279125000).

Almost surely, 2^165990751080 is an apocalyptic number.

165990751080 is a gapful number since it is divisible by the number (10) 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 165990751080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327456000000).

165990751080 is an abundant number, since it is smaller than the sum of its proper divisors (488921248920).

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

165990751080 is a wasteful number, since it uses less digits than its factorization.

165990751080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 51.

The spelling of 165990751080 in words is "one hundred sixty-five billion, nine hundred ninety million, seven hundred fifty-one thousand, eighty".