165672111715020 has 72 divisors (see below), whose sum is σ = 502616163263760. Its totient is φ = 44172423250560.

The previous prime is 165672111715013. The next prime is 165672111715031. The reversal of 165672111715020 is 20517111276561.

165672111715020 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 7 + 21 + 117 + 1 + 502 + 0 = 666.

It is a super-2 number, since 2×165672111715020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69729835 + ... + 72066594.

It is an arithmetic number, because the mean of its divisors is an integer number (6980780045330).

Almost surely, 2^{165672111715020} is an apocalyptic number.

165672111715020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165672111715020 is an abundant number, since it is smaller than the sum of its proper divisors (336944051548740).

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

165672111715020 is a wasteful number, since it uses less digits than its factorization.

165672111715020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141802935 (or 141802930 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The spelling of 165672111715020 in words is "one hundred sixty-five trillion, six hundred seventy-two billion, one hundred eleven million, seven hundred fifteen thousand, twenty".