6428285665 has 8 divisors (see below), whose sum is σ = 7724951208. Its totient is φ = 5135289600.

The previous prime is 6428285659. The next prime is 6428285671. The reversal of 6428285665 is 5665828246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6428285659) and next prime (6428285671).

It can be written as a sum of positive squares in 4 ways, for example, as 137733696 + 6290551969 = 11736^2 + 79313^2 .

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

It is not a de Polignac number, because 6428285665 - 2⁹ = 6428285153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913512 + ... + 920521.

It is an arithmetic number, because the mean of its divisors is an integer number (965618901).

Almost surely, 2^6428285665 is an apocalyptic number.

It is an amenable number.

6428285665 is a deficient number, since it is larger than the sum of its proper divisors (1296665543).

6428285665 is a wasteful number, since it uses less digits than its factorization.

6428285665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834739.

The product of its digits is 5529600, while the sum is 52.

The square root of 6428285665 is about 80176.5905049597. The cubic root of 6428285665 is about 1859.3667309813.

The spelling of 6428285665 in words is "six billion, four hundred twenty-eight million, two hundred eighty-five thousand, six hundred sixty-five".