23646661 has 2 divisors, whose sum is σ = 23646662. Its totient is φ = 23646660.

The previous prime is 23646641. The next prime is 23646673. The reversal of 23646661 is 16664632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22982436 + 664225 = 4794^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 23646661 - 2¹⁷ = 23515589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23646641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11823330 + 11823331.

It is an arithmetic number, because the mean of its divisors is an integer number (11823331).

Almost surely, 2^23646661 is an apocalyptic number.

It is an amenable number.

23646661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23646661 is an equidigital number, since it uses as much as digits as its factorization.

23646661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 23646661 is about 4862.7832565312. The cubic root of 23646661 is about 287.0273458709.

It can be divided in two parts, 2364 and 6661, that added together give a square (9025 = 95²).

The spelling of 23646661 in words is "twenty-three million, six hundred forty-six thousand, six hundred sixty-one".