166869366611 has 2 divisors, whose sum is σ = 166869366612. Its totient is φ = 166869366610.

The previous prime is 166869366563. The next prime is 166869366761. The reversal of 166869366611 is 116663968661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166869366611 is a prime.

It is not a weakly prime, because it can be changed into another prime (166869366311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83434683305 + 83434683306.

It is an arithmetic number, because the mean of its divisors is an integer number (83434683306).

Almost surely, 2^166869366611 is an apocalyptic number.

166869366611 is a deficient number, since it is larger than the sum of its proper divisors (1).

166869366611 is an equidigital number, since it uses as much as digits as its factorization.

166869366611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 59.

The spelling of 166869366611 in words is "one hundred sixty-six billion, eight hundred sixty-nine million, three hundred sixty-six thousand, six hundred eleven".