665426843 has 8 divisors (see below), whose sum is σ = 683730096. Its totient is φ = 647222400.

The previous prime is 665426831. The next prime is 665426863. The reversal of 665426843 is 348624566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665426843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665426794 and 665426803.

It is not an unprimeable number, because it can be changed into a prime (665426813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10946 + ... + 38087.

It is an arithmetic number, because the mean of its divisors is an integer number (85466262).

Almost surely, 2^665426843 is an apocalyptic number.

665426843 is a deficient number, since it is larger than the sum of its proper divisors (18303253).

665426843 is a wasteful number, since it uses less digits than its factorization.

665426843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49405.

The product of its digits is 829440, while the sum is 44.

The square root of 665426843 is about 25795.8687196225. The cubic root of 665426843 is about 873.0385858127.

The spelling of 665426843 in words is "six hundred sixty-five million, four hundred twenty-six thousand, eight hundred forty-three".