66698167 has 2 divisors, whose sum is σ = 66698168. Its totient is φ = 66698166.

The previous prime is 66698141. The next prime is 66698197. The reversal of 66698167 is 76189666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66698167 - 2¹⁵ = 66665399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66698167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66698197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33349083 + 33349084.

It is an arithmetic number, because the mean of its divisors is an integer number (33349084).

Almost surely, 2^66698167 is an apocalyptic number.

66698167 is a deficient number, since it is larger than the sum of its proper divisors (1).

66698167 is an equidigital number, since it uses as much as digits as its factorization.

66698167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 66698167 is about 8166.8945750512. The cubic root of 66698167 is about 405.5439867790.

The spelling of 66698167 in words is "sixty-six million, six hundred ninety-eight thousand, one hundred sixty-seven".