72266760731 has 4 divisors (see below), whose sum is σ = 78836466264. Its totient is φ = 65697055200.

The previous prime is 72266760707. The next prime is 72266760757. The reversal of 72266760731 is 13706766227.

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

It is a cyclic number.

It is not a de Polignac number, because 72266760731 - 2²² = 72262566427 is a prime.

It is a super-2 number, since 2×72266760731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72266760701) 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, 3284852750 + ... + 3284852771.

It is an arithmetic number, because the mean of its divisors is an integer number (19709116566).

Almost surely, 2^72266760731 is an apocalyptic number.

72266760731 is a deficient number, since it is larger than the sum of its proper divisors (6569705533).

72266760731 is a wasteful number, since it uses less digits than its factorization.

72266760731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569705532.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 72266760731 in words is "seventy-two billion, two hundred sixty-six million, seven hundred sixty thousand, seven hundred thirty-one".