66896699 has 2 divisors, whose sum is σ = 66896700. Its totient is φ = 66896698.

The previous prime is 66896671. The next prime is 66896723. The reversal of 66896699 is 99669866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66896699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66896639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33448349 + 33448350.

It is an arithmetic number, because the mean of its divisors is an integer number (33448350).

Almost surely, 2^66896699 is an apocalyptic number.

66896699 is a deficient number, since it is larger than the sum of its proper divisors (1).

66896699 is an equidigital number, since it uses as much as digits as its factorization.

66896699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 59.

The square root of 66896699 is about 8179.0402248675. The cubic root of 66896699 is about 405.9459653715.

The spelling of 66896699 in words is "sixty-six million, eight hundred ninety-six thousand, six hundred ninety-nine".