665541452 has 12 divisors (see below), whose sum is σ = 1173077640. Its totient is φ = 330376416.

The previous prime is 665541431. The next prime is 665541463. The reversal of 665541452 is 254145566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597953 + ... + 599064.

It is an arithmetic number, because the mean of its divisors is an integer number (97756470).

Almost surely, 2^665541452 is an apocalyptic number.

It is an amenable number.

665541452 is a deficient number, since it is larger than the sum of its proper divisors (507536188).

665541452 is a wasteful number, since it uses less digits than its factorization.

665541452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197160 (or 1197158 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

The square root of 665541452 is about 25798.0900843454. The cubic root of 665541452 is about 873.0887051892.

The spelling of 665541452 in words is "six hundred sixty-five million, five hundred forty-one thousand, four hundred fifty-two".