669006563 has 2 divisors, whose sum is σ = 669006564. Its totient is φ = 669006562.

The previous prime is 669006521. The next prime is 669006577. The reversal of 669006563 is 365600966.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669006563 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 669006563.

It is not a weakly prime, because it can be changed into another prime (669006263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334503281 + 334503282.

It is an arithmetic number, because the mean of its divisors is an integer number (334503282).

Almost surely, 2^669006563 is an apocalyptic number.

669006563 is a deficient number, since it is larger than the sum of its proper divisors (1).

669006563 is an equidigital number, since it uses as much as digits as its factorization.

669006563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 669006563 is about 25865.1611825637. The cubic root of 669006563 is about 874.6013151873.

The spelling of 669006563 in words is "six hundred sixty-nine million, six thousand, five hundred sixty-three".