7666659090749 has 2 divisors, whose sum is σ = 7666659090750. Its totient is φ = 7666659090748.

The previous prime is 7666659090709. The next prime is 7666659090767. The reversal of 7666659090749 is 9470909566667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6363419946724 + 1303239144025 = 2522582^2 + 1141595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7666659090749 is a prime.

It is a super-2 number, since 2×7666659090749² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7666659090709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833329545374 + 3833329545375.

It is an arithmetic number, because the mean of its divisors is an integer number (3833329545375).

Almost surely, 2^{7666659090749} is an apocalyptic number.

It is an amenable number.

7666659090749 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666659090749 is an equidigital number, since it uses as much as digits as its factorization.

7666659090749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 925888320, while the sum is 74.

The spelling of 7666659090749 in words is "seven trillion, six hundred sixty-six billion, six hundred fifty-nine million, ninety thousand, seven hundred forty-nine".