669814063 has 2 divisors, whose sum is σ = 669814064. Its totient is φ = 669814062.

The previous prime is 669814051. The next prime is 669814141. The reversal of 669814063 is 360418966.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669814063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669814463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334907031 + 334907032.

It is an arithmetic number, because the mean of its divisors is an integer number (334907032).

Almost surely, 2^669814063 is an apocalyptic number.

669814063 is a deficient number, since it is larger than the sum of its proper divisors (1).

669814063 is an equidigital number, since it uses as much as digits as its factorization.

669814063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 669814063 is about 25880.7662753636. The cubic root of 669814063 is about 874.9530589240.

The spelling of 669814063 in words is "six hundred sixty-nine million, eight hundred fourteen thousand, sixty-three".