666101633399 has 2 divisors, whose sum is σ = 666101633400. Its totient is φ = 666101633398.

The previous prime is 666101633371. The next prime is 666101633429. The reversal of 666101633399 is 993336101666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666101633399 - 2⁸ = 666101633143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666101633399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666101633299) 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, 333050816699 + 333050816700.

It is an arithmetic number, because the mean of its divisors is an integer number (333050816700).

Almost surely, 2^666101633399 is an apocalyptic number.

666101633399 is a deficient number, since it is larger than the sum of its proper divisors (1).

666101633399 is an equidigital number, since it uses as much as digits as its factorization.

666101633399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 53.

The spelling of 666101633399 in words is "six hundred sixty-six billion, one hundred one million, six hundred thirty-three thousand, three hundred ninety-nine".