23666660243 has 16 divisors (see below), whose sum is σ = 25759641600. Its totient is φ = 21660877440.

The previous prime is 23666660219. The next prime is 23666660273. The reversal of 23666660243 is 34206666632.

It is a cyclic number.

It is not a de Polignac number, because 23666660243 - 2²⁶ = 23599551379 is a prime.

It is a super-2 number, since 2×23666660243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23666660194 and 23666660203.

It is not an unprimeable number, because it can be changed into a prime (23666660273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315398 + ... + 383156.

It is an arithmetic number, because the mean of its divisors is an integer number (1609977600).

Almost surely, 2^23666660243 is an apocalyptic number.

23666660243 is a deficient number, since it is larger than the sum of its proper divisors (2092981357).

23666660243 is a wasteful number, since it uses less digits than its factorization.

23666660243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68402.

The product of its (nonzero) digits is 1119744, while the sum is 44.

The spelling of 23666660243 in words is "twenty-three billion, six hundred sixty-six million, six hundred sixty thousand, two hundred forty-three".