2600626661 has 2 divisors, whose sum is σ = 2600626662. Its totient is φ = 2600626660.

The previous prime is 2600626621. The next prime is 2600626681. The reversal of 2600626661 is 1666260062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2499000100 + 101626561 = 49990^2 + 10081^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2600626661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2600626621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300313330 + 1300313331.

It is an arithmetic number, because the mean of its divisors is an integer number (1300313331).

Almost surely, 2^2600626661 is an apocalyptic number.

It is an amenable number.

2600626661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2600626661 is an equidigital number, since it uses as much as digits as its factorization.

2600626661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 2600626661 is about 50996.3396823733. The cubic root of 2600626661 is about 1375.1793328191.

The spelling of 2600626661 in words is "two billion, six hundred million, six hundred twenty-six thousand, six hundred sixty-one".