665037043 has 8 divisors (see below), whose sum is σ = 727974576. Its totient is φ = 602512800.

The previous prime is 665037029. The next prime is 665037071. The reversal of 665037043 is 340730566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665037043 - 2¹⁷ = 664905971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665037073) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 99948 + ... + 106393.

It is an arithmetic number, because the mean of its divisors is an integer number (90996822).

Almost surely, 2^665037043 is an apocalyptic number.

665037043 is a deficient number, since it is larger than the sum of its proper divisors (62937533).

665037043 is a wasteful number, since it uses less digits than its factorization.

665037043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206645.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 665037043 is about 25788.3121394170. The cubic root of 665037043 is about 872.8680802613.

The spelling of 665037043 in words is "six hundred sixty-five million, thirty-seven thousand, forty-three".