66916627 has 2 divisors, whose sum is σ = 66916628. Its totient is φ = 66916626.

The previous prime is 66916621. The next prime is 66916639. The reversal of 66916627 is 72661966.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66916627 is a prime.

It is not a weakly prime, because it can be changed into another prime (66916621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33458313 + 33458314.

It is an arithmetic number, because the mean of its divisors is an integer number (33458314).

Almost surely, 2^66916627 is an apocalyptic number.

66916627 is a deficient number, since it is larger than the sum of its proper divisors (1).

66916627 is an equidigital number, since it uses as much as digits as its factorization.

66916627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 66916627 is about 8180.2583700027. The cubic root of 66916627 is about 405.9862707386.

The spelling of 66916627 in words is "sixty-six million, nine hundred sixteen thousand, six hundred twenty-seven".