167700670649 has 2 divisors, whose sum is σ = 167700670650. Its totient is φ = 167700670648.

The previous prime is 167700670589. The next prime is 167700670651. The reversal of 167700670649 is 946076007761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89688270400 + 78012400249 = 299480^2 + 279307^2 .

It is a cyclic number.

It is not a de Polignac number, because 167700670649 - 2¹⁶ = 167700605113 is a prime.

It is a super-2 number, since 2×167700670649² (a number of 23 digits) contains 22 as substring.

Together with 167700670651, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 167700670649.

It is not a weakly prime, because it can be changed into another prime (167700670549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83850335324 + 83850335325.

It is an arithmetic number, because the mean of its divisors is an integer number (83850335325).

Almost surely, 2^167700670649 is an apocalyptic number.

It is an amenable number.

167700670649 is a deficient number, since it is larger than the sum of its proper divisors (1).

167700670649 is an equidigital number, since it uses as much as digits as its factorization.

167700670649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 167700670649 in words is "one hundred sixty-seven billion, seven hundred million, six hundred seventy thousand, six hundred forty-nine".