165006720000 has 660 divisors, whose sum is σ = 618008967576. Its totient is φ = 43960320000.

The previous prime is 165006719963. The next prime is 165006720023. The reversal of 165006720000 is 27600561.

165006720000 is a `hidden beast` number, since 1 + 650 + 0 + 6 + 7 + 2 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 155519470 + ... + 155520530.

Almost surely, 2^165006720000 is an apocalyptic number.

165006720000 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 165006720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309004483788).

165006720000 is an abundant number, since it is smaller than the sum of its proper divisors (453002247576).

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

165006720000 is an frugal number, since it uses more digits than its factorization.

165006720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The spelling of 165006720000 in words is "one hundred sixty-five billion, six million, seven hundred twenty thousand".