665534452 has 12 divisors (see below), whose sum is σ = 1270565856. Its totient is φ = 302515640.

The previous prime is 665534449. The next prime is 665534453. The reversal of 665534452 is 254435566.

It is a happy number.

It is a super-2 number, since 2×665534452² = 885872213597880608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665534453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7562848 + ... + 7562935.

It is an arithmetic number, because the mean of its divisors is an integer number (105880488).

Almost surely, 2^665534452 is an apocalyptic number.

It is an amenable number.

665534452 is a deficient number, since it is larger than the sum of its proper divisors (605031404).

665534452 is a wasteful number, since it uses less digits than its factorization.

665534452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15125798 (or 15125796 counting only the distinct ones).

The product of its digits is 432000, while the sum is 40.

The square root of 665534452 is about 25797.9544150307. The cubic root of 665534452 is about 873.0856442016.

The spelling of 665534452 in words is "six hundred sixty-five million, five hundred thirty-four thousand, four hundred fifty-two".