23013621666 has 64 divisors (see below), whose sum is σ = 59168943360. Its totient is φ = 6575311728.

The previous prime is 23013621647. The next prime is 23013621677. The reversal of 23013621666 is 66612631032.

It is a self number, because there is not a number n which added to its sum of digits gives 23013621666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345201 + ... + 406436.

It is an arithmetic number, because the mean of its divisors is an integer number (924514740).

Almost surely, 2^23013621666 is an apocalyptic number.

23013621666 is an abundant number, since it is smaller than the sum of its proper divisors (36155321694).

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

23013621666 is an frugal number, since it uses more digits than its factorization.

23013621666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751667 (or 751649 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 23013621666 in words is "twenty-three billion, thirteen million, six hundred twenty-one thousand, six hundred sixty-six".