23666643 has 96 divisors (see below), whose sum is σ = 47803392. Its totient is φ = 10886400.

The previous prime is 23666627. The next prime is 23666677. The reversal of 23666643 is 34666632.

It is not a de Polignac number, because 23666643 - 2⁴ = 23666627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23666598 and 23666607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23666693) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 333298 + ... + 333368.

It is an arithmetic number, because the mean of its divisors is an integer number (497952).

Almost surely, 2^23666643 is an apocalyptic number.

23666643 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

23666643 is a wasteful number, since it uses less digits than its factorization.

23666643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 142 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 23666643 is about 4864.8374073549. The cubic root of 23666643 is about 287.1081714566.

It can be divided in two parts, 2366 and 6643, that added together give a palindrome (9009).

The spelling of 23666643 in words is "twenty-three million, six hundred sixty-six thousand, six hundred forty-three".