166521060683 has 2 divisors, whose sum is σ = 166521060684. Its totient is φ = 166521060682.

The previous prime is 166521060623. The next prime is 166521060709. The reversal of 166521060683 is 386060125661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166521060683 - 2⁸ = 166521060427 is a prime.

It is not a weakly prime, because it can be changed into another prime (166521060623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83260530341 + 83260530342.

It is an arithmetic number, because the mean of its divisors is an integer number (83260530342).

Almost surely, 2^166521060683 is an apocalyptic number.

166521060683 is a deficient number, since it is larger than the sum of its proper divisors (1).

166521060683 is an equidigital number, since it uses as much as digits as its factorization.

166521060683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 166521060683 in words is "one hundred sixty-six billion, five hundred twenty-one million, sixty thousand, six hundred eighty-three".