2660365613 has 2 divisors, whose sum is σ = 2660365614. Its totient is φ = 2660365612.

The previous prime is 2660365597. The next prime is 2660365621. The reversal of 2660365613 is 3165630662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1613066569 + 1047299044 = 40163^2 + 32362^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660365613 - 2⁴ = 2660365597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660365913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330182806 + 1330182807.

It is an arithmetic number, because the mean of its divisors is an integer number (1330182807).

Almost surely, 2^2660365613 is an apocalyptic number.

It is an amenable number.

2660365613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660365613 is an equidigital number, since it uses as much as digits as its factorization.

2660365613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 2660365613 is about 51578.7321771290. The cubic root of 2660365613 is about 1385.6294606478.

The spelling of 2660365613 in words is "two billion, six hundred sixty million, three hundred sixty-five thousand, six hundred thirteen".