2665690697 has 2 divisors, whose sum is σ = 2665690698. Its totient is φ = 2665690696.

The previous prime is 2665690673. The next prime is 2665690721. The reversal of 2665690697 is 7960965662.

It is a balanced prime because it is at equal distance from previous prime (2665690673) and next prime (2665690721).

It can be written as a sum of positive squares in only one way, i.e., 2649778576 + 15912121 = 51476^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665690697 - 2¹⁴ = 2665674313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2665690297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332845348 + 1332845349.

It is an arithmetic number, because the mean of its divisors is an integer number (1332845349).

Almost surely, 2^2665690697 is an apocalyptic number.

It is an amenable number.

2665690697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665690697 is an equidigital number, since it uses as much as digits as its factorization.

2665690697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The square root of 2665690697 is about 51630.3272989819. The cubic root of 2665690697 is about 1386.5533531654.

The spelling of 2665690697 in words is "two billion, six hundred sixty-five million, six hundred ninety thousand, six hundred ninety-seven".