2166520346311 has 2 divisors, whose sum is σ = 2166520346312. Its totient is φ = 2166520346310.

The previous prime is 2166520346297. The next prime is 2166520346387. The reversal of 2166520346311 is 1136430256612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166520346311 - 2⁵ = 2166520346279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166520346911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083260173155 + 1083260173156.

It is an arithmetic number, because the mean of its divisors is an integer number (1083260173156).

Almost surely, 2^{2166520346311} is an apocalyptic number.

2166520346311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166520346311 is an equidigital number, since it uses as much as digits as its factorization.

2166520346311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 2166520346311 in words is "two trillion, one hundred sixty-six billion, five hundred twenty million, three hundred forty-six thousand, three hundred eleven".