72767765 has 8 divisors (see below), whose sum is σ = 99795840. Its totient is φ = 49897872.

The previous prime is 72767741. The next prime is 72767813. The reversal of 72767765 is 56776727.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72767765 is a prime.

It is a Curzon number.

It is a congruent number.

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, 1039505 + ... + 1039574.

It is an arithmetic number, because the mean of its divisors is an integer number (12474480).

Almost surely, 2^72767765 is an apocalyptic number.

It is an amenable number.

72767765 is a deficient number, since it is larger than the sum of its proper divisors (27028075).

72767765 is a wasteful number, since it uses less digits than its factorization.

72767765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079091.

The product of its digits is 864360, while the sum is 47.

The square root of 72767765 is about 8530.4023937913. The cubic root of 72767765 is about 417.4902575804.

The spelling of 72767765 in words is "seventy-two million, seven hundred sixty-seven thousand, seven hundred sixty-five".