6660847665607 has 2 divisors, whose sum is σ = 6660847665608. Its totient is φ = 6660847665606.

The previous prime is 6660847665467. The next prime is 6660847665643. The reversal of 6660847665607 is 7065667480666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6660847665607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6660847665677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330423832803 + 3330423832804.

It is an arithmetic number, because the mean of its divisors is an integer number (3330423832804).

Almost surely, 2^{6660847665607} is an apocalyptic number.

6660847665607 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660847665607 is an equidigital number, since it uses as much as digits as its factorization.

6660847665607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 365783040, while the sum is 67.

The spelling of 6660847665607 in words is "six trillion, six hundred sixty billion, eight hundred forty-seven million, six hundred sixty-five thousand, six hundred seven".