66566290207 has 2 divisors, whose sum is σ = 66566290208. Its totient is φ = 66566290206.

The previous prime is 66566290201. The next prime is 66566290243. The reversal of 66566290207 is 70209266566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66566290207 - 2¹⁹ = 66565765919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66566290201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33283145103 + 33283145104.

It is an arithmetic number, because the mean of its divisors is an integer number (33283145104).

Almost surely, 2^66566290207 is an apocalyptic number.

66566290207 is a deficient number, since it is larger than the sum of its proper divisors (1).

66566290207 is an equidigital number, since it uses as much as digits as its factorization.

66566290207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 66566290207 in words is "sixty-six billion, five hundred sixty-six million, two hundred ninety thousand, two hundred seven".