2520600661 has 2 divisors, whose sum is σ = 2520600662. Its totient is φ = 2520600660.

The previous prime is 2520600601. The next prime is 2520600673. The reversal of 2520600661 is 1660060252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2470686436 + 49914225 = 49706^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520600661 - 2¹⁵ = 2520567893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520600601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260300330 + 1260300331.

It is an arithmetic number, because the mean of its divisors is an integer number (1260300331).

Almost surely, 2^2520600661 is an apocalyptic number.

It is an amenable number.

2520600661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520600661 is an equidigital number, since it uses as much as digits as its factorization.

2520600661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2520600661 is about 50205.5839623443. The cubic root of 2520600661 is about 1360.9265350451.

The spelling of 2520600661 in words is "two billion, five hundred twenty million, six hundred thousand, six hundred sixty-one".