23666663534 has 16 divisors (see below), whose sum is σ = 37102741200. Its totient is φ = 11307496704.

The previous prime is 23666663491. The next prime is 23666663539. The reversal of 23666663534 is 43536666632.

It is a super-2 number, since 2×23666663534² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23666663539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097704 + ... + 2108955.

It is an arithmetic number, because the mean of its divisors is an integer number (2318921325).

Almost surely, 2^23666663534 is an apocalyptic number.

23666663534 is a deficient number, since it is larger than the sum of its proper divisors (13436077666).

23666663534 is a wasteful number, since it uses less digits than its factorization.

23666663534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206787.

The product of its digits is 8398080, while the sum is 50.

The spelling of 23666663534 in words is "twenty-three billion, six hundred sixty-six million, six hundred sixty-three thousand, five hundred thirty-four".