23661669 has 16 divisors (see below), whose sum is σ = 33313280. Its totient is φ = 14897520.

The previous prime is 23661643. The next prime is 23661679. The reversal of 23661669 is 96616632.

It is a happy number.

It is not a de Polignac number, because 23661669 - 2¹⁵ = 23628901 is a prime.

It is a super-2 number, since 2×23661669² = 1119749159731122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23661619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32184 + ... + 32910.

It is an arithmetic number, because the mean of its divisors is an integer number (2082080).

Almost surely, 2^23661669 is an apocalyptic number.

It is an amenable number.

23661669 is a deficient number, since it is larger than the sum of its proper divisors (9651611).

23661669 is a wasteful number, since it uses less digits than its factorization.

23661669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its digits is 69984, while the sum is 39.

The square root of 23661669 is about 4864.3261609395. The cubic root of 23661669 is about 287.0880562801.

The spelling of 23661669 in words is "twenty-three million, six hundred sixty-one thousand, six hundred sixty-nine".