2661972559 has 2 divisors, whose sum is σ = 2661972560. Its totient is φ = 2661972558.

The previous prime is 2661972517. The next prime is 2661972563. The reversal of 2661972559 is 9552791662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661972559 - 2¹⁹ = 2661448271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661972569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330986279 + 1330986280.

It is an arithmetic number, because the mean of its divisors is an integer number (1330986280).

Almost surely, 2^2661972559 is an apocalyptic number.

2661972559 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661972559 is an equidigital number, since it uses as much as digits as its factorization.

2661972559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 52.

The square root of 2661972559 is about 51594.3074282425. The cubic root of 2661972559 is about 1385.9083926788.

The spelling of 2661972559 in words is "two billion, six hundred sixty-one million, nine hundred seventy-two thousand, five hundred fifty-nine".