675257645 has 4 divisors (see below), whose sum is σ = 810309180. Its totient is φ = 540206112.

The previous prime is 675257591. The next prime is 675257651. The reversal of 675257645 is 546752576.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83649316 + 591608329 = 9146^2 + 24323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675257645 is a prime.

It is a super-3 number, since 3×675257645³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 675257645.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 67525760 + ... + 67525769.

It is an arithmetic number, because the mean of its divisors is an integer number (202577295).

Almost surely, 2^675257645 is an apocalyptic number.

It is an amenable number.

675257645 is a deficient number, since it is larger than the sum of its proper divisors (135051535).

675257645 is a wasteful number, since it uses less digits than its factorization.

675257645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135051534.

The product of its digits is 1764000, while the sum is 47.

The square root of 675257645 is about 25985.7200208114. The cubic root of 675257645 is about 877.3169159408.

The spelling of 675257645 in words is "six hundred seventy-five million, two hundred fifty-seven thousand, six hundred forty-five".