6666737340667 has 2 divisors, whose sum is σ = 6666737340668. Its totient is φ = 6666737340666.

The previous prime is 6666737340631. The next prime is 6666737340821. The reversal of 6666737340667 is 7660437376666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666737340667 is a prime.

It is not a weakly prime, because it can be changed into another prime (6666737340607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333368670333 + 3333368670334.

It is an arithmetic number, because the mean of its divisors is an integer number (3333368670334).

Almost surely, 2^{6666737340667} is an apocalyptic number.

6666737340667 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666737340667 is an equidigital number, since it uses as much as digits as its factorization.

6666737340667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576108288, while the sum is 67.

The spelling of 6666737340667 in words is "six trillion, six hundred sixty-six billion, seven hundred thirty-seven million, three hundred forty thousand, six hundred sixty-seven".