561326666107 has 2 divisors, whose sum is σ = 561326666108. Its totient is φ = 561326666106.

The previous prime is 561326666093. The next prime is 561326666137. The reversal of 561326666107 is 701666623165.

561326666107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561326666107 is a prime.

It is not a weakly prime, because it can be changed into another prime (561326666137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280663333053 + 280663333054.

It is an arithmetic number, because the mean of its divisors is an integer number (280663333054).

Almost surely, 2^561326666107 is an apocalyptic number.

561326666107 is a deficient number, since it is larger than the sum of its proper divisors (1).

561326666107 is an equidigital number, since it uses as much as digits as its factorization.

561326666107 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 561326666107 in words is "five hundred sixty-one billion, three hundred twenty-six million, six hundred sixty-six thousand, one hundred seven".