66964927 has 2 divisors, whose sum is σ = 66964928. Its totient is φ = 66964926.

The previous prime is 66964907. The next prime is 66964939. The reversal of 66964927 is 72946966.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66964927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66964907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33482463 + 33482464.

It is an arithmetic number, because the mean of its divisors is an integer number (33482464).

Almost surely, 2^66964927 is an apocalyptic number.

66964927 is a deficient number, since it is larger than the sum of its proper divisors (1).

66964927 is an equidigital number, since it uses as much as digits as its factorization.

66964927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 66964927 is about 8183.2100669603. The cubic root of 66964927 is about 406.0839266912.

The spelling of 66964927 in words is "sixty-six million, nine hundred sixty-four thousand, nine hundred twenty-seven".