23666798574640 has 320 divisors, whose sum is σ = 61470071663616. Its totient is φ = 8417456050176.

The previous prime is 23666798574631. The next prime is 23666798574659. The reversal of 23666798574640 is 4647589766632.

It is a super-2 number, since 2×23666798574640² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1649591947 + ... + 1649606293.

Almost surely, 2^{23666798574640} is an apocalyptic number.

23666798574640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23666798574640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30735035831808).

23666798574640 is an abundant number, since it is smaller than the sum of its proper divisors (37803273088976).

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

23666798574640 is a wasteful number, since it uses less digits than its factorization.

23666798574640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14836 (or 14830 counting only the distinct ones).

The product of its (nonzero) digits is 2194698240, while the sum is 73.

The spelling of 23666798574640 in words is "twenty-three trillion, six hundred sixty-six billion, seven hundred ninety-eight million, five hundred seventy-four thousand, six hundred forty".