23666542566464 has 224 divisors, whose sum is σ = 55526918151936. Its totient is φ = 9797690327040.

The previous prime is 23666542566463. The next prime is 23666542566487. The reversal of 23666542566464 is 46466524566632.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a self number, because there is not a number n which added to its sum of digits gives 23666542566464.

It is not an unprimeable number, because it can be changed into a prime (23666542566463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3163549604 + ... + 3163557084.

It is an arithmetic number, because the mean of its divisors is an integer number (247888027464).

Almost surely, 2^{23666542566464} 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 23666542566464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27763459075968).

23666542566464 is an abundant number, since it is smaller than the sum of its proper divisors (31860375585472).

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

23666542566464 is a wasteful number, since it uses less digits than its factorization.

23666542566464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9333 (or 9323 counting only the distinct ones).

The product of its digits is 895795200, while the sum is 65.

The spelling of 23666542566464 in words is "twenty-three trillion, six hundred sixty-six billion, five hundred forty-two million, five hundred sixty-six thousand, four hundred sixty-four".