669814141 has 2 divisors, whose sum is σ = 669814142. Its totient is φ = 669814140.

The previous prime is 669814063. The next prime is 669814147. The reversal of 669814141 is 141418966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552720100 + 117094041 = 23510^2 + 10821^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669814141 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 669814094 and 669814103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669814147) 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, 334907070 + 334907071.

It is an arithmetic number, because the mean of its divisors is an integer number (334907071).

Almost surely, 2^669814141 is an apocalyptic number.

It is an amenable number.

669814141 is a deficient number, since it is larger than the sum of its proper divisors (1).

669814141 is an equidigital number, since it uses as much as digits as its factorization.

669814141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 669814141 is about 25880.7677822742. The cubic root of 669814141 is about 874.9530928868.

The spelling of 669814141 in words is "six hundred sixty-nine million, eight hundred fourteen thousand, one hundred forty-one".