66760667 has 2 divisors, whose sum is σ = 66760668. Its totient is φ = 66760666.

The previous prime is 66760567. The next prime is 66760679. The reversal of 66760667 is 76606766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66760667 - 2²⁰ = 65712091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66760367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33380333 + 33380334.

It is an arithmetic number, because the mean of its divisors is an integer number (33380334).

Almost surely, 2^66760667 is an apocalyptic number.

66760667 is a deficient number, since it is larger than the sum of its proper divisors (1).

66760667 is an equidigital number, since it uses as much as digits as its factorization.

66760667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 66760667 is about 8170.7201029040. The cubic root of 66760667 is about 405.6706198755.

The spelling of 66760667 in words is "sixty-six million, seven hundred sixty thousand, six hundred sixty-seven".