66416963 has 2 divisors, whose sum is σ = 66416964. Its totient is φ = 66416962.

The previous prime is 66416957. The next prime is 66416981. The reversal of 66416963 is 36961466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66416963 is a prime.

It is a super-2 number, since 2×66416963² = 8822425948286738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66416963.

It is not a weakly prime, because it can be changed into another prime (66416863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33208481 + 33208482.

It is an arithmetic number, because the mean of its divisors is an integer number (33208482).

Almost surely, 2^66416963 is an apocalyptic number.

66416963 is a deficient number, since it is larger than the sum of its proper divisors (1).

66416963 is an equidigital number, since it uses as much as digits as its factorization.

66416963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 66416963 is about 8149.6602996689. The cubic root of 66416963 is about 404.9732502782.

The spelling of 66416963 in words is "sixty-six million, four hundred sixteen thousand, nine hundred sixty-three".