72039672665 has 8 divisors (see below), whose sum is σ = 87737870400. Its totient is φ = 56771562672.

The previous prime is 72039672641. The next prime is 72039672673. The reversal of 72039672665 is 56627693027.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72039672665 - 2¹⁴ = 72039656281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107521565 + ... + 107522234.

It is an arithmetic number, because the mean of its divisors is an integer number (10967233800).

Almost surely, 2^72039672665 is an apocalyptic number.

It is an amenable number.

72039672665 is a deficient number, since it is larger than the sum of its proper divisors (15698197735).

72039672665 is a wasteful number, since it uses less digits than its factorization.

72039672665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215043871.

The product of its (nonzero) digits is 5715360, while the sum is 53.

The spelling of 72039672665 in words is "seventy-two billion, thirty-nine million, six hundred seventy-two thousand, six hundred sixty-five".