665862445 has 8 divisors (see below), whose sum is σ = 799630200. Its totient is φ = 532293120.

The previous prime is 665862401. The next prime is 665862451. The reversal of 665862445 is 544268566.

It can be written as a sum of positive squares in 4 ways, for example, as 74545956 + 591316489 = 8634^2 + 24317^2 .

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

It is not a de Polignac number, because 665862445 - 2¹¹ = 665860397 is a prime.

It is a super-2 number, since 2×665862445² = 886745591322756050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665862395 and 665862404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42120 + ... + 55729.

It is an arithmetic number, because the mean of its divisors is an integer number (99953775).

Almost surely, 2^665862445 is an apocalyptic number.

It is an amenable number.

665862445 is a deficient number, since it is larger than the sum of its proper divisors (133767755).

665862445 is a wasteful number, since it uses less digits than its factorization.

665862445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99215.

The product of its digits is 1382400, while the sum is 46.

The square root of 665862445 is about 25804.3105895120. The cubic root of 665862445 is about 873.2290472209.

The spelling of 665862445 in words is "six hundred sixty-five million, eight hundred sixty-two thousand, four hundred forty-five".