23666878099 has 4 divisors (see below), whose sum is σ = 23670282064. Its totient is φ = 23663474136.

The previous prime is 23666878063. The next prime is 23666878121. The reversal of 23666878099 is 99087866632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23666878099 is a prime.

It is a super-2 number, since 2×23666878099² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23666878099.

It is not an unprimeable number, because it can be changed into a prime (23666878009) 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, 1691532 + ... + 1705465.

It is an arithmetic number, because the mean of its divisors is an integer number (5917570516).

Almost surely, 2^23666878099 is an apocalyptic number.

23666878099 is a deficient number, since it is larger than the sum of its proper divisors (3403965).

23666878099 is an equidigital number, since it uses as much as digits as its factorization.

23666878099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403964.

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 23666878099 in words is "twenty-three billion, six hundred sixty-six million, eight hundred seventy-eight thousand, ninety-nine".