2116663266631 has 4 divisors (see below), whose sum is σ = 2125096188264. Its totient is φ = 2108230345000.

The previous prime is 2116663266611. The next prime is 2116663266643. The reversal of 2116663266631 is 1366623666112.

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

It is a cyclic number.

It is not a de Polignac number, because 2116663266631 - 2¹⁵ = 2116663233863 is a prime.

It is a super-2 number, since 2×2116663266631² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116663266611) 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, 4216460440 + ... + 4216460941.

It is an arithmetic number, because the mean of its divisors is an integer number (531274047066).

Almost surely, 2^{2116663266631} is an apocalyptic number.

2116663266631 is a deficient number, since it is larger than the sum of its proper divisors (8432921633).

2116663266631 is an equidigital number, since it uses as much as digits as its factorization.

2116663266631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432921632.

The product of its digits is 1679616, while the sum is 49.

The spelling of 2116663266631 in words is "two trillion, one hundred sixteen billion, six hundred sixty-three million, two hundred sixty-six thousand, six hundred thirty-one".