665602325 has 12 divisors (see below), whose sum is σ = 827993508. Its totient is φ = 530774400.

The previous prime is 665602291. The next prime is 665602331. The reversal of 665602325 is 523206566.

It can be written as a sum of positive squares in 6 ways, for example, as 28494244 + 637108081 = 5338^2 + 25241^2 .

It is not a de Polignac number, because 665602325 - 2¹⁶ = 665536789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34706 + ... + 50355.

It is an arithmetic number, because the mean of its divisors is an integer number (68999459).

Almost surely, 2^665602325 is an apocalyptic number.

It is an amenable number.

665602325 is a deficient number, since it is larger than the sum of its proper divisors (162391183).

665602325 is a wasteful number, since it uses less digits than its factorization.

665602325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85384 (or 85379 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 665602325 is about 25799.2698540094. The cubic root of 665602325 is about 873.1153230697.

The spelling of 665602325 in words is "six hundred sixty-five million, six hundred two thousand, three hundred twenty-five".