23666066631 has 6 divisors (see below), whose sum is σ = 34184318480. Its totient is φ = 15777377748.

The previous prime is 23666066621. The next prime is 23666066647. The reversal of 23666066631 is 13666066632.

It is a happy number.

It is not a de Polignac number, because 23666066631 - 2¹⁰ = 23666065607 is a prime.

It is a super-2 number, since 2×23666066631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23666066621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1314781471 + ... + 1314781488.

Almost surely, 2^23666066631 is an apocalyptic number.

23666066631 is a deficient number, since it is larger than the sum of its proper divisors (10518251849).

23666066631 is a wasteful number, since it uses less digits than its factorization.

23666066631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629562965 (or 2629562962 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 45.

Subtracting from 23666066631 its reverse (13666066632), we obtain a palindrome (9999999999).

The spelling of 23666066631 in words is "twenty-three billion, six hundred sixty-six million, sixty-six thousand, six hundred thirty-one".