23666121 has 8 divisors (see below), whose sum is σ = 35060960. Its totient is φ = 15777396.

The previous prime is 23666107. The next prime is 23666129. The reversal of 23666121 is 12166632.

It is not a de Polignac number, because 23666121 - 2¹⁵ = 23633353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 876523 = 23666121 / (2 + 3 + 6 + 6 + 6 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23666129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438235 + ... + 438288.

It is an arithmetic number, because the mean of its divisors is an integer number (4382620).

Almost surely, 2^23666121 is an apocalyptic number.

It is an amenable number.

23666121 is a deficient number, since it is larger than the sum of its proper divisors (11394839).

23666121 is an equidigital number, since it uses as much as digits as its factorization.

23666121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876532 (or 876526 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 23666121 is about 4864.7837567563. The cubic root of 23666121 is about 287.1060605873.

The spelling of 23666121 in words is "twenty-three million, six hundred sixty-six thousand, one hundred twenty-one".