8664443578723 has 4 divisors (see below), whose sum is σ = 8664453427608. Its totient is φ = 8664433729840.

The previous prime is 8664443578627. The next prime is 8664443578733. The reversal of 8664443578723 is 3278753444668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8664443578723 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8664443578733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3459586 + ... + 5412727.

It is an arithmetic number, because the mean of its divisors is an integer number (2166113356902).

Almost surely, 2^{8664443578723} is an apocalyptic number.

8664443578723 is a deficient number, since it is larger than the sum of its proper divisors (9848885).

8664443578723 is an equidigital number, since it uses as much as digits as its factorization.

8664443578723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848884.

The product of its digits is 650280960, while the sum is 67.

The spelling of 8664443578723 in words is "eight trillion, six hundred sixty-four billion, four hundred forty-three million, five hundred seventy-eight thousand, seven hundred twenty-three".