166131374863 has 2 divisors, whose sum is σ = 166131374864. Its totient is φ = 166131374862.

The previous prime is 166131374839. The next prime is 166131374867. The reversal of 166131374863 is 368473131661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166131374863 - 2²⁹ = 165594503951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166131374867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83065687431 + 83065687432.

It is an arithmetic number, because the mean of its divisors is an integer number (83065687432).

Almost surely, 2^166131374863 is an apocalyptic number.

166131374863 is a deficient number, since it is larger than the sum of its proper divisors (1).

166131374863 is an equidigital number, since it uses as much as digits as its factorization.

166131374863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The spelling of 166131374863 in words is "one hundred sixty-six billion, one hundred thirty-one million, three hundred seventy-four thousand, eight hundred sixty-three".