66105967 has 2 divisors, whose sum is σ = 66105968. Its totient is φ = 66105966.

The previous prime is 66105961. The next prime is 66105971. The reversal of 66105967 is 76950166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66105967 - 2¹⁹ = 65581679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052983 + 33052984.

It is an arithmetic number, because the mean of its divisors is an integer number (33052984).

Almost surely, 2^66105967 is an apocalyptic number.

66105967 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105967 is an equidigital number, since it uses as much as digits as its factorization.

66105967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 66105967 is about 8130.5576069542. The cubic root of 66105967 is about 404.3401682734.

The spelling of 66105967 in words is "sixty-six million, one hundred five thousand, nine hundred sixty-seven".