2661760993 has 2 divisors, whose sum is σ = 2661760994. Its totient is φ = 2661760992.

The previous prime is 2661760973. The next prime is 2661760999. The reversal of 2661760993 is 3990671662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1805145169 + 856615824 = 42487^2 + 29268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661760993 - 2⁹ = 2661760481 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661760999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330880496 + 1330880497.

It is an arithmetic number, because the mean of its divisors is an integer number (1330880497).

Almost surely, 2^2661760993 is an apocalyptic number.

It is an amenable number.

2661760993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661760993 is an equidigital number, since it uses as much as digits as its factorization.

2661760993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 2661760993 is about 51592.2571031739. The cubic root of 2661760993 is about 1385.8716756883.

The spelling of 2661760993 in words is "two billion, six hundred sixty-one million, seven hundred sixty thousand, nine hundred ninety-three".