669112811 has 2 divisors, whose sum is σ = 669112812. Its totient is φ = 669112810.

The previous prime is 669112799. The next prime is 669112831. The reversal of 669112811 is 118211966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669112811 - 2⁶ = 669112747 is a prime.

It is not a weakly prime, because it can be changed into another prime (669112831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334556405 + 334556406.

It is an arithmetic number, because the mean of its divisors is an integer number (334556406).

Almost surely, 2^669112811 is an apocalyptic number.

669112811 is a deficient number, since it is larger than the sum of its proper divisors (1).

669112811 is an equidigital number, since it uses as much as digits as its factorization.

669112811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 669112811 is about 25867.2149834496. The cubic root of 669112811 is about 874.6476125516.

The spelling of 669112811 in words is "six hundred sixty-nine million, one hundred twelve thousand, eight hundred eleven".