675640717 has 4 divisors (see below), whose sum is σ = 678670720. Its totient is φ = 672610716.

The previous prime is 675640687. The next prime is 675640729. The reversal of 675640717 is 717046576.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675640717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675640787) 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, 1514667 + ... + 1515112.

It is an arithmetic number, because the mean of its divisors is an integer number (169667680).

Almost surely, 2^675640717 is an apocalyptic number.

It is an amenable number.

675640717 is a deficient number, since it is larger than the sum of its proper divisors (3030003).

675640717 is a wasteful number, since it uses less digits than its factorization.

675640717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030002.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 675640717 is about 25993.0897932508. The cubic root of 675640717 is about 877.4827844881.

The spelling of 675640717 in words is "six hundred seventy-five million, six hundred forty thousand, seven hundred seventeen".