669522811 has 2 divisors, whose sum is σ = 669522812. Its totient is φ = 669522810.

The previous prime is 669522793. The next prime is 669522863. The reversal of 669522811 is 118225966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669522811 - 2⁹ = 669522299 is a prime.

It is not a weakly prime, because it can be changed into another prime (669522311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334761405 + 334761406.

It is an arithmetic number, because the mean of its divisors is an integer number (334761406).

Almost surely, 2^669522811 is an apocalyptic number.

669522811 is a deficient number, since it is larger than the sum of its proper divisors (1).

669522811 is an equidigital number, since it uses as much as digits as its factorization.

669522811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 669522811 is about 25875.1388595308. The cubic root of 669522811 is about 874.8262233403.

The spelling of 669522811 in words is "six hundred sixty-nine million, five hundred twenty-two thousand, eight hundred eleven".