665255043 has 24 divisors (see below), whose sum is σ = 975094848. Its totient is φ = 436992432.

The previous prime is 665255029. The next prime is 665255047. The reversal of 665255043 is 340552566.

It is a happy number.

665255043 is a `hidden beast` number, since 6 + 65 + 2 + 550 + 43 = 666.

It is not a de Polignac number, because 665255043 - 2⁴ = 665255027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665254989 and 665255007.

It is not an unprimeable number, because it can be changed into a prime (665255047) 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 23 ways as a sum of consecutive naturals, for example, 347896 + ... + 349802.

It is an arithmetic number, because the mean of its divisors is an integer number (40628952).

Almost surely, 2^665255043 is an apocalyptic number.

665255043 is a deficient number, since it is larger than the sum of its proper divisors (309839805).

665255043 is a wasteful number, since it uses less digits than its factorization.

665255043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463 (or 2460 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 665255043 is about 25792.5385140742. The cubic root of 665255043 is about 872.9634456024.

The spelling of 665255043 in words is "six hundred sixty-five million, two hundred fifty-five thousand, forty-three".