167978384663 has 2 divisors, whose sum is σ = 167978384664. Its totient is φ = 167978384662.

The previous prime is 167978384659. The next prime is 167978384681. The reversal of 167978384663 is 366483879761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 167978384663 - 2² = 167978384659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 167978384593 and 167978384602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167978384263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83989192331 + 83989192332.

It is an arithmetic number, because the mean of its divisors is an integer number (83989192332).

Almost surely, 2^167978384663 is an apocalyptic number.

167978384663 is a deficient number, since it is larger than the sum of its proper divisors (1).

167978384663 is an equidigital number, since it uses as much as digits as its factorization.

167978384663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 219469824, while the sum is 68.

The spelling of 167978384663 in words is "one hundred sixty-seven billion, nine hundred seventy-eight million, three hundred eighty-four thousand, six hundred sixty-three".