6338666105861 has 2 divisors, whose sum is σ = 6338666105862. Its totient is φ = 6338666105860.

The previous prime is 6338666105857. The next prime is 6338666105867. The reversal of 6338666105861 is 1685016668336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6338662228900 + 3876961 = 2517670^2 + 1969^2 .

It is a cyclic number.

It is not a de Polignac number, because 6338666105861 - 2² = 6338666105857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6338666105861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6338666105867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3169333052930 + 3169333052931.

It is an arithmetic number, because the mean of its divisors is an integer number (3169333052931).

Almost surely, 2^{6338666105861} is an apocalyptic number.

It is an amenable number.

6338666105861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6338666105861 is an equidigital number, since it uses as much as digits as its factorization.

6338666105861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 6338666105861 in words is "six trillion, three hundred thirty-eight billion, six hundred sixty-six million, one hundred five thousand, eight hundred sixty-one".