66611050699 has 2 divisors, whose sum is σ = 66611050700. Its totient is φ = 66611050698.

The previous prime is 66611050663. The next prime is 66611050757. The reversal of 66611050699 is 99605011666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66611050699 is a prime.

It is not a weakly prime, because it can be changed into another prime (66611050609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33305525349 + 33305525350.

It is an arithmetic number, because the mean of its divisors is an integer number (33305525350).

Almost surely, 2^66611050699 is an apocalyptic number.

66611050699 is a deficient number, since it is larger than the sum of its proper divisors (1).

66611050699 is an equidigital number, since it uses as much as digits as its factorization.

66611050699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 66611050699 in words is "sixty-six billion, six hundred eleven million, fifty thousand, six hundred ninety-nine".