669200517 has 12 divisors (see below), whose sum is σ = 970847020. Its totient is φ = 444184128.

The previous prime is 669200513. The next prime is 669200527. The reversal of 669200517 is 715002966.

It can be written as a sum of positive squares in 2 ways, for example, as 276922881 + 392277636 = 16641^2 + 19806^2 .

It is not a de Polignac number, because 669200517 - 2² = 669200513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669200513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160288 + ... + 164409.

Almost surely, 2^669200517 is an apocalyptic number.

It is an amenable number.

669200517 is a deficient number, since it is larger than the sum of its proper divisors (301646503).

669200517 is a wasteful number, since it uses less digits than its factorization.

669200517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324932 (or 324929 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 669200517 is about 25868.9102398999. The cubic root of 669200517 is about 874.6858265820.

The spelling of 669200517 in words is "six hundred sixty-nine million, two hundred thousand, five hundred seventeen".