6610665111551 has 2 divisors, whose sum is σ = 6610665111552. Its totient is φ = 6610665111550.

The previous prime is 6610665111539. The next prime is 6610665111559. The reversal of 6610665111551 is 1551115660166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6610665111551 - 2⁶ = 6610665111487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6610665111559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305332555775 + 3305332555776.

It is an arithmetic number, because the mean of its divisors is an integer number (3305332555776).

Almost surely, 2^{6610665111551} is an apocalyptic number.

6610665111551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6610665111551 is an equidigital number, since it uses as much as digits as its factorization.

6610665111551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 6610665111551 in words is "six trillion, six hundred ten billion, six hundred sixty-five million, one hundred eleven thousand, five hundred fifty-one".