72699067717 has 4 divisors (see below), whose sum is σ = 72764622540. Its totient is φ = 72633512896.

The previous prime is 72699067709. The next prime is 72699067729. The reversal of 72699067717 is 71776099627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30807621441 + 41891446276 = 175521^2 + 204674^2 .

It is a cyclic number.

It is not a de Polignac number, because 72699067717 - 2³ = 72699067709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72699067757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32775748 + ... + 32777965.

It is an arithmetic number, because the mean of its divisors is an integer number (18191155635).

Almost surely, 2^72699067717 is an apocalyptic number.

It is an amenable number.

72699067717 is a deficient number, since it is larger than the sum of its proper divisors (65554823).

72699067717 is a wasteful number, since it uses less digits than its factorization.

72699067717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65554822.

The product of its (nonzero) digits is 14002632, while the sum is 61.

The spelling of 72699067717 in words is "seventy-two billion, six hundred ninety-nine million, sixty-seven thousand, seven hundred seventeen".