66667366499 has 2 divisors, whose sum is σ = 66667366500. Its totient is φ = 66667366498.

The previous prime is 66667366487. The next prime is 66667366523. The reversal of 66667366499 is 99466376666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66667366499 is a prime.

It is a super-5 number, since 5×66667366499⁵ (a number of 55 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (66667366699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333683249 + 33333683250.

It is an arithmetic number, because the mean of its divisors is an integer number (33333683250).

Almost surely, 2^66667366499 is an apocalyptic number.

66667366499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66667366499 is an equidigital number, since it uses as much as digits as its factorization.

66667366499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317447424, while the sum is 68.

The spelling of 66667366499 in words is "sixty-six billion, six hundred sixty-seven million, three hundred sixty-six thousand, four hundred ninety-nine".