2166106620607 has 2 divisors, whose sum is σ = 2166106620608. Its totient is φ = 2166106620606.

The previous prime is 2166106620599. The next prime is 2166106620611. The reversal of 2166106620607 is 7060266016612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166106620607 - 2³ = 2166106620599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166106620617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083053310303 + 1083053310304.

It is an arithmetic number, because the mean of its divisors is an integer number (1083053310304).

Almost surely, 2^{2166106620607} is an apocalyptic number.

2166106620607 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166106620607 is an equidigital number, since it uses as much as digits as its factorization.

2166106620607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 2166106620607 in words is "two trillion, one hundred sixty-six billion, one hundred six million, six hundred twenty thousand, six hundred seven".