65676407731 has 4 divisors (see below), whose sum is σ = 71646990264. Its totient is φ = 59705825200.

The previous prime is 65676407663. The next prime is 65676407737. The reversal of 65676407731 is 13770467656.

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 65676407731 - 2⁹ = 65676407219 is a prime.

It is a super-2 number, since 2×65676407731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65676407737) 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, 2985291250 + ... + 2985291271.

It is an arithmetic number, because the mean of its divisors is an integer number (17911747566).

Almost surely, 2^65676407731 is an apocalyptic number.

65676407731 is a deficient number, since it is larger than the sum of its proper divisors (5970582533).

65676407731 is a wasteful number, since it uses less digits than its factorization.

65676407731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970582532.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 65676407731 in words is "sixty-five billion, six hundred seventy-six million, four hundred seven thousand, seven hundred thirty-one".