667785377411 has 2 divisors, whose sum is σ = 667785377412. Its totient is φ = 667785377410.

The previous prime is 667785377387. The next prime is 667785377417. The reversal of 667785377411 is 114773587766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667785377411 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (667785377417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333892688705 + 333892688706.

It is an arithmetic number, because the mean of its divisors is an integer number (333892688706).

Almost surely, 2^667785377411 is an apocalyptic number.

667785377411 is a deficient number, since it is larger than the sum of its proper divisors (1).

667785377411 is an equidigital number, since it uses as much as digits as its factorization.

667785377411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41489280, while the sum is 62.

The spelling of 667785377411 in words is "six hundred sixty-seven billion, seven hundred eighty-five million, three hundred seventy-seven thousand, four hundred eleven".