665086043 has 4 divisors (see below), whose sum is σ = 665559480. Its totient is φ = 664612608.

The previous prime is 665086033. The next prime is 665086061. The reversal of 665086043 is 340680566.

665086043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340680566 = 2 ⋅170340283.

It is a cyclic number.

It is not a de Polignac number, because 665086043 - 2⁴ = 665086027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665085988 and 665086006.

It is not an unprimeable number, because it can be changed into a prime (665086003) 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, 234605 + ... + 237422.

It is an arithmetic number, because the mean of its divisors is an integer number (166389870).

Almost surely, 2^665086043 is an apocalyptic number.

665086043 is a deficient number, since it is larger than the sum of its proper divisors (473437).

665086043 is a wasteful number, since it uses less digits than its factorization.

665086043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473436.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 665086043 is about 25789.2621647072. The cubic root of 665086043 is about 872.8895174057.

The spelling of 665086043 in words is "six hundred sixty-five million, eighty-six thousand, forty-three".