669413603329 has 27 divisors (see below), whose sum is σ = 703389007867. Its totient is φ = 637052248448.

The previous prime is 669413603323. The next prime is 669413603363. The reversal of 669413603329 is 923306314966.

The square root of 669413603329 is 818177.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 666272225025 + 3141378304 = 816255^2 + 56048^2 .

It is not a de Polignac number, because 669413603329 - 2¹⁷ = 669413472257 is a prime.

It is a super-2 number, since 2×669413603329² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669413603323) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2111714679 + ... + 2111714995.

Almost surely, 2^669413603329 is an apocalyptic number.

669413603329 is the 818177-th square number.

669413603329 is the 409089-th centered octagonal number.

It is an amenable number.

669413603329 is a deficient number, since it is larger than the sum of its proper divisors (33975404538).

669413603329 is an frugal number, since it uses more digits than its factorization.

669413603329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 52.

The spelling of 669413603329 in words is "six hundred sixty-nine billion, four hundred thirteen million, six hundred three thousand, three hundred twenty-nine".