23661664 has 48 divisors (see below), whose sum is σ = 52369632. Its totient is φ = 10441728.

The previous prime is 23661643. The next prime is 23661679. The reversal of 23661664 is 46616632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8332 + ... + 10804.

It is an arithmetic number, because the mean of its divisors is an integer number (1091034).

Almost surely, 2^23661664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23661664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26184816).

23661664 is an abundant number, since it is smaller than the sum of its proper divisors (28707968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23661664 is a wasteful number, since it uses less digits than its factorization.

23661664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519 (or 2511 counting only the distinct ones).

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

The square root of 23661664 is about 4864.3256469936. The cubic root of 23661664 is about 287.0880360583.

The spelling of 23661664 in words is "twenty-three million, six hundred sixty-one thousand, six hundred sixty-four".