166261076207 has 2 divisors, whose sum is σ = 166261076208. Its totient is φ = 166261076206.

The previous prime is 166261076167. The next prime is 166261076263. The reversal of 166261076207 is 702670162661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166261076207 - 2⁸ = 166261075951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166261076407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83130538103 + 83130538104.

It is an arithmetic number, because the mean of its divisors is an integer number (83130538104).

Almost surely, 2^166261076207 is an apocalyptic number.

166261076207 is a deficient number, since it is larger than the sum of its proper divisors (1).

166261076207 is an equidigital number, since it uses as much as digits as its factorization.

166261076207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 166261076207 in words is "one hundred sixty-six billion, two hundred sixty-one million, seventy-six thousand, two hundred seven".