3666899566201 has 2 divisors, whose sum is σ = 3666899566202. Its totient is φ = 3666899566200.

The previous prime is 3666899566189. The next prime is 3666899566217. The reversal of 3666899566201 is 1026659986663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3628110657600 + 38788908601 = 1904760^2 + 196949^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666899566201 - 2¹⁹ = 3666899041913 is a prime.

It is not a weakly prime, because it can be changed into another prime (3666899566261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833449783100 + 1833449783101.

It is an arithmetic number, because the mean of its divisors is an integer number (1833449783101).

Almost surely, 2^{3666899566201} is an apocalyptic number.

It is an amenable number.

3666899566201 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666899566201 is an equidigital number, since it uses as much as digits as its factorization.

3666899566201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151165440, while the sum is 67.

The spelling of 3666899566201 in words is "three trillion, six hundred sixty-six billion, eight hundred ninety-nine million, five hundred sixty-six thousand, two hundred one".