1566244426651 has 2 divisors, whose sum is σ = 1566244426652. Its totient is φ = 1566244426650.

The previous prime is 1566244426627. The next prime is 1566244426673.

1566244426651 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1566244426651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1566244426151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783122213325 + 783122213326.

It is an arithmetic number, because the mean of its divisors is an integer number (783122213326).

Almost surely, 2^{1566244426651} is an apocalyptic number.

1566244426651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566244426651 is an equidigital number, since it uses as much as digits as its factorization.

1566244426651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8294400, while the sum is 52.

The spelling of 1566244426651 in words is "one trillion, five hundred sixty-six billion, two hundred forty-four million, four hundred twenty-six thousand, six hundred fifty-one".