167968492661 has 2 divisors, whose sum is σ = 167968492662. Its totient is φ = 167968492660.

The previous prime is 167968492651. The next prime is 167968492687. The reversal of 167968492661 is 166294869761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130794339025 + 37174153636 = 361655^2 + 192806^2 .

It is a cyclic number.

It is not a de Polignac number, because 167968492661 - 2²² = 167964298357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167968492651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83984246330 + 83984246331.

It is an arithmetic number, because the mean of its divisors is an integer number (83984246331).

Almost surely, 2^167968492661 is an apocalyptic number.

It is an amenable number.

167968492661 is a deficient number, since it is larger than the sum of its proper divisors (1).

167968492661 is an equidigital number, since it uses as much as digits as its factorization.

167968492661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 65.

The spelling of 167968492661 in words is "one hundred sixty-seven billion, nine hundred sixty-eight million, four hundred ninety-two thousand, six hundred sixty-one".