51665670167 has 2 divisors, whose sum is σ = 51665670168. Its totient is φ = 51665670166.

The previous prime is 51665670163. The next prime is 51665670169. The reversal of 51665670167 is 76107656615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51665670167 - 2² = 51665670163 is a prime.

Together with 51665670169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51665670163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25832835083 + 25832835084.

It is an arithmetic number, because the mean of its divisors is an integer number (25832835084).

Almost surely, 2^51665670167 is an apocalyptic number.

51665670167 is a deficient number, since it is larger than the sum of its proper divisors (1).

51665670167 is an equidigital number, since it uses as much as digits as its factorization.

51665670167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 51665670167 in words is "fifty-one billion, six hundred sixty-five million, six hundred seventy thousand, one hundred sixty-seven".