6660892291 has 2 divisors, whose sum is σ = 6660892292. Its totient is φ = 6660892290.

The previous prime is 6660892243. The next prime is 6660892297. The reversal of 6660892291 is 1922980666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6660892291 is a prime.

It is a super-2 number, since 2×6660892291² = 88734972224606457362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6660892297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330446145 + 3330446146.

It is an arithmetic number, because the mean of its divisors is an integer number (3330446146).

Almost surely, 2^6660892291 is an apocalyptic number.

6660892291 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660892291 is an equidigital number, since it uses as much as digits as its factorization.

6660892291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 6660892291 is about 81614.2897475681. The cubic root of 6660892291 is about 1881.5285112451.

The spelling of 6660892291 in words is "six billion, six hundred sixty million, eight hundred ninety-two thousand, two hundred ninety-one".