6552615665 has 4 divisors (see below), whose sum is σ = 7863138804. Its totient is φ = 5242092528.

The previous prime is 6552615653. The next prime is 6552615689. The reversal of 6552615665 is 5665162556.

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 4406702689 + 2145912976 = 66383^2 + 46324^2 .

It is a cyclic number.

It is not a de Polignac number, because 6552615665 - 2⁴ = 6552615649 is a prime.

It is a Duffinian 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, 655261562 + ... + 655261571.

It is an arithmetic number, because the mean of its divisors is an integer number (1965784701).

Almost surely, 2^6552615665 is an apocalyptic number.

It is an amenable number.

6552615665 is a deficient number, since it is larger than the sum of its proper divisors (1310523139).

6552615665 is a wasteful number, since it uses less digits than its factorization.

6552615665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310523138.

The product of its digits is 1620000, while the sum is 47.

The square root of 6552615665 is about 80948.2283005626. The cubic root of 6552615665 is about 1871.2776559356.

The spelling of 6552615665 in words is "six billion, five hundred fifty-two million, six hundred fifteen thousand, six hundred sixty-five".