2166616161701 has 2 divisors, whose sum is σ = 2166616161702. Its totient is φ = 2166616161700.

The previous prime is 2166616161623. The next prime is 2166616161727. The reversal of 2166616161701 is 1071616166612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1842735660676 + 323880501025 = 1357474^2 + 569105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166616161701 - 2²² = 2166611967397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166616161601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083308080850 + 1083308080851.

It is an arithmetic number, because the mean of its divisors is an integer number (1083308080851).

Almost surely, 2^{2166616161701} is an apocalyptic number.

It is an amenable number.

2166616161701 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166616161701 is an equidigital number, since it uses as much as digits as its factorization.

2166616161701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 2166616161701 in words is "two trillion, one hundred sixty-six billion, six hundred sixteen million, one hundred sixty-one thousand, seven hundred one".