2166706651093 has 2 divisors, whose sum is σ = 2166706651094. Its totient is φ = 2166706651092.

The previous prime is 2166706651091. The next prime is 2166706651121. The reversal of 2166706651093 is 3901566076612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2157540886449 + 9165764644 = 1468857^2 + 95738^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166706651093 - 2¹ = 2166706651091 is a prime.

Together with 2166706651091, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2166706651093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166706651091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083353325546 + 1083353325547.

It is an arithmetic number, because the mean of its divisors is an integer number (1083353325547).

Almost surely, 2^{2166706651093} is an apocalyptic number.

It is an amenable number.

2166706651093 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166706651093 is an equidigital number, since it uses as much as digits as its factorization.

2166706651093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 2166706651093 in words is "two trillion, one hundred sixty-six billion, seven hundred six million, six hundred fifty-one thousand, ninety-three".