67736974957 has 2 divisors, whose sum is σ = 67736974958. Its totient is φ = 67736974956.

The previous prime is 67736974909. The next prime is 67736974967. The reversal of 67736974957 is 75947963776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49969684521 + 17767290436 = 223539^2 + 133294^2 .

It is a cyclic number.

It is not a de Polignac number, because 67736974957 - 2²³ = 67728586349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67736974967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33868487478 + 33868487479.

It is an arithmetic number, because the mean of its divisors is an integer number (33868487479).

Almost surely, 2^67736974957 is an apocalyptic number.

It is an amenable number.

67736974957 is a deficient number, since it is larger than the sum of its proper divisors (1).

67736974957 is an equidigital number, since it uses as much as digits as its factorization.

67736974957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420078960, while the sum is 70.

The spelling of 67736974957 in words is "sixty-seven billion, seven hundred thirty-six million, nine hundred seventy-four thousand, nine hundred fifty-seven".