166851868627 has 2 divisors, whose sum is σ = 166851868628. Its totient is φ = 166851868626.

The previous prime is 166851868553. The next prime is 166851868639. The reversal of 166851868627 is 726868158661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166851868627 is a prime.

It is not a weakly prime, because it can be changed into another prime (166851868657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83425934313 + 83425934314.

It is an arithmetic number, because the mean of its divisors is an integer number (83425934314).

Almost surely, 2^166851868627 is an apocalyptic number.

166851868627 is a deficient number, since it is larger than the sum of its proper divisors (1).

166851868627 is an equidigital number, since it uses as much as digits as its factorization.

166851868627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 64.

The spelling of 166851868627 in words is "one hundred sixty-six billion, eight hundred fifty-one million, eight hundred sixty-eight thousand, six hundred twenty-seven".