66693810167 has 2 divisors, whose sum is σ = 66693810168. Its totient is φ = 66693810166.

The previous prime is 66693810149. The next prime is 66693810179. The reversal of 66693810167 is 76101839666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66693810167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66693810107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33346905083 + 33346905084.

It is an arithmetic number, because the mean of its divisors is an integer number (33346905084).

Almost surely, 2^66693810167 is an apocalyptic number.

66693810167 is a deficient number, since it is larger than the sum of its proper divisors (1).

66693810167 is an equidigital number, since it uses as much as digits as its factorization.

66693810167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 66693810167 in words is "sixty-six billion, six hundred ninety-three million, eight hundred ten thousand, one hundred sixty-seven".