665675659 has 8 divisors (see below), whose sum is σ = 764412480. Its totient is φ = 573309000.

The previous prime is 665675651. The next prime is 665675677. The reversal of 665675659 is 956576566.

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

It is not a de Polignac number, because 665675659 - 2³ = 665675651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665675651) 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, 1592317 + ... + 1592734.

It is an arithmetic number, because the mean of its divisors is an integer number (95551560).

Almost surely, 2^665675659 is an apocalyptic number.

665675659 is a deficient number, since it is larger than the sum of its proper divisors (98736821).

665675659 is a wasteful number, since it uses less digits than its factorization.

665675659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185081.

The product of its digits is 10206000, while the sum is 55.

The square root of 665675659 is about 25800.6910566364. The cubic root of 665675659 is about 873.1473876050.

The spelling of 665675659 in words is "six hundred sixty-five million, six hundred seventy-five thousand, six hundred fifty-nine".