2620366261 has 2 divisors, whose sum is σ = 2620366262. Its totient is φ = 2620366260.

The previous prime is 2620366219. The next prime is 2620366279. The reversal of 2620366261 is 1626630262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1387935025 + 1232431236 = 37255^2 + 35106^2 .

It is a cyclic number.

It is not a de Polignac number, because 2620366261 - 2²³ = 2611977653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2620366291) 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, 1310183130 + 1310183131.

It is an arithmetic number, because the mean of its divisors is an integer number (1310183131).

Almost surely, 2^2620366261 is an apocalyptic number.

It is an amenable number.

2620366261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2620366261 is an equidigital number, since it uses as much as digits as its factorization.

2620366261 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 34.

The square root of 2620366261 is about 51189.5131936220. The cubic root of 2620366261 is about 1378.6499190306.

The spelling of 2620366261 in words is "two billion, six hundred twenty million, three hundred sixty-six thousand, two hundred sixty-one".