6660216999907 has 2 divisors, whose sum is σ = 6660216999908. Its totient is φ = 6660216999906.

The previous prime is 6660216999871. The next prime is 6660217000033. The reversal of 6660216999907 is 7099996120666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6660216999907 - 2¹⁵ = 6660216967139 is a prime.

It is not a weakly prime, because it can be changed into another prime (6660246999907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330108499953 + 3330108499954.

It is an arithmetic number, because the mean of its divisors is an integer number (3330108499954).

Almost surely, 2^{6660216999907} is an apocalyptic number.

6660216999907 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660216999907 is an equidigital number, since it uses as much as digits as its factorization.

6660216999907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119042784, while the sum is 70.

The spelling of 6660216999907 in words is "six trillion, six hundred sixty billion, two hundred sixteen million, nine hundred ninety-nine thousand, nine hundred seven".