2166723074361 has 8 divisors (see below), whose sum is σ = 2925533265280. Its totient is φ = 1426197466512.

The previous prime is 2166723074297. The next prime is 2166723074363. The reversal of 2166723074361 is 1634703276612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166723074361 - 2⁶ = 2166723074297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166723074361.

It is not an unprimeable number, because it can be changed into a prime (2166723074363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4571145490 + ... + 4571145963.

It is an arithmetic number, because the mean of its divisors is an integer number (365691658160).

Almost surely, 2^{2166723074361} is an apocalyptic number.

It is an amenable number.

2166723074361 is a deficient number, since it is larger than the sum of its proper divisors (758810190919).

2166723074361 is an equidigital number, since it uses as much as digits as its factorization.

2166723074361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142291535.

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 2166723074361 in words is "two trillion, one hundred sixty-six billion, seven hundred twenty-three million, seventy-four thousand, three hundred sixty-one".