5665566000491 has 2 divisors, whose sum is σ = 5665566000492. Its totient is φ = 5665566000490.

The previous prime is 5665566000439. The next prime is 5665566000509. The reversal of 5665566000491 is 1940006655665.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5665566000491 is a prime.

It is not a weakly prime, because it can be changed into another prime (5665566000191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832783000245 + 2832783000246.

It is an arithmetic number, because the mean of its divisors is an integer number (2832783000246).

Almost surely, 2^{5665566000491} is an apocalyptic number.

5665566000491 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665566000491 is an equidigital number, since it uses as much as digits as its factorization.

5665566000491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 5665566000491 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-six million, four hundred ninety-one", and thus it is an aban number.