166863084331 has 2 divisors, whose sum is σ = 166863084332. Its totient is φ = 166863084330.

The previous prime is 166863084257. The next prime is 166863084337. The reversal of 166863084331 is 133480368661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166863084331 - 2³⁵ = 132503345963 is a prime.

It is a super-2 number, since 2×166863084331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166863084337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83431542165 + 83431542166.

It is an arithmetic number, because the mean of its divisors is an integer number (83431542166).

Almost surely, 2^166863084331 is an apocalyptic number.

166863084331 is a deficient number, since it is larger than the sum of its proper divisors (1).

166863084331 is an equidigital number, since it uses as much as digits as its factorization.

166863084331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 166863084331 in words is "one hundred sixty-six billion, eight hundred sixty-three million, eighty-four thousand, three hundred thirty-one".