2166516658093 has 2 divisors, whose sum is σ = 2166516658094. Its totient is φ = 2166516658092.

The previous prime is 2166516658087. The next prime is 2166516658133. The reversal of 2166516658093 is 3908566156612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2166510216649 + 6441444 = 1471907^2 + 2538^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166516658093 - 2¹³ = 2166516649901 is a prime.

It is a super-2 number, since 2×2166516658093² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166516658073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083258329046 + 1083258329047.

It is an arithmetic number, because the mean of its divisors is an integer number (1083258329047).

Almost surely, 2^{2166516658093} is an apocalyptic number.

It is an amenable number.

2166516658093 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166516658093 is an equidigital number, since it uses as much as digits as its factorization.

2166516658093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13996800, while the sum is 58.

The spelling of 2166516658093 in words is "two trillion, one hundred sixty-six billion, five hundred sixteen million, six hundred fifty-eight thousand, ninety-three".