669262961 has 2 divisors, whose sum is σ = 669262962. Its totient is φ = 669262960.

The previous prime is 669262907. The next prime is 669263003. The reversal of 669262961 is 169262966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347598736 + 321664225 = 18644^2 + 17935^2 .

It is a cyclic number.

It is not a de Polignac number, because 669262961 - 2¹⁰ = 669261937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (669262361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334631480 + 334631481.

It is an arithmetic number, because the mean of its divisors is an integer number (334631481).

Almost surely, 2^669262961 is an apocalyptic number.

It is an amenable number.

669262961 is a deficient number, since it is larger than the sum of its proper divisors (1).

669262961 is an equidigital number, since it uses as much as digits as its factorization.

669262961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 669262961 is about 25870.1171431441. The cubic root of 669262961 is about 874.7130317727.

The spelling of 669262961 in words is "six hundred sixty-nine million, two hundred sixty-two thousand, nine hundred sixty-one".