72005660665000 has 80 divisors (see below), whose sum is σ = 168904764673920. Its totient is φ = 28768887960000.

The previous prime is 72005660664953. The next prime is 72005660665033. The reversal of 72005660665000 is 56606650027.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4028646 + ... + 12658645.

It is an arithmetic number, because the mean of its divisors is an integer number (2111309558424).

Almost surely, 2^{72005660665000} is an apocalyptic number.

It is an amenable number.

72005660665000 is an abundant number, since it is smaller than the sum of its proper divisors (96899104008920).

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

72005660665000 is a wasteful number, since it uses less digits than its factorization.

72005660665000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16688180 (or 16688161 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 72005660665000 in words is "seventy-two trillion, five billion, six hundred sixty million, six hundred sixty-five thousand".