166310056243 has 2 divisors, whose sum is σ = 166310056244. Its totient is φ = 166310056242.

The previous prime is 166310056229. The next prime is 166310056271. The reversal of 166310056243 is 342650013661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166310056243 is a prime.

It is not a weakly prime, because it can be changed into another prime (166310056043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83155028121 + 83155028122.

It is an arithmetic number, because the mean of its divisors is an integer number (83155028122).

Almost surely, 2^166310056243 is an apocalyptic number.

166310056243 is a deficient number, since it is larger than the sum of its proper divisors (1).

166310056243 is an equidigital number, since it uses as much as digits as its factorization.

166310056243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 166310056243 in words is "one hundred sixty-six billion, three hundred ten million, fifty-six thousand, two hundred forty-three".