2166797216713 has 4 divisors (see below), whose sum is σ = 2171246492800. Its totient is φ = 2162347940628.

The previous prime is 2166797216657. The next prime is 2166797216737. The reversal of 2166797216713 is 3176127976612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166797216713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166797216113) 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, 2224637313 + ... + 2224638286.

It is an arithmetic number, because the mean of its divisors is an integer number (542811623200).

Almost surely, 2^{2166797216713} is an apocalyptic number.

It is an amenable number.

2166797216713 is a deficient number, since it is larger than the sum of its proper divisors (4449276087).

2166797216713 is an equidigital number, since it uses as much as digits as its factorization.

2166797216713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449276086.

The product of its digits is 8001504, while the sum is 58.

The spelling of 2166797216713 in words is "two trillion, one hundred sixty-six billion, seven hundred ninety-seven million, two hundred sixteen thousand, seven hundred thirteen".