66463867 has 2 divisors, whose sum is σ = 66463868. Its totient is φ = 66463866.

The previous prime is 66463849. The next prime is 66463871. The reversal of 66463867 is 76836466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66463867 is a prime.

It is not a weakly prime, because it can be changed into another prime (66463847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33231933 + 33231934.

It is an arithmetic number, because the mean of its divisors is an integer number (33231934).

Almost surely, 2^66463867 is an apocalyptic number.

66463867 is a deficient number, since it is larger than the sum of its proper divisors (1).

66463867 is an equidigital number, since it uses as much as digits as its factorization.

66463867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 66463867 is about 8152.5374577490. The cubic root of 66463867 is about 405.0685592414.

The spelling of 66463867 in words is "sixty-six million, four hundred sixty-three thousand, eight hundred sixty-seven".