5220659665 has 8 divisors (see below), whose sum is σ = 6746698728. Its totient is φ = 3855256320.

The previous prime is 5220659651. The next prime is 5220659677. The reversal of 5220659665 is 5669560225.

It can be written as a sum of positive squares in 4 ways, for example, as 394856641 + 4825803024 = 19871^2 + 69468^2 .

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

It is not a de Polignac number, because 5220659665 - 2⁷ = 5220659537 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, 40158856 + ... + 40158985.

It is an arithmetic number, because the mean of its divisors is an integer number (843337341).

Almost surely, 2^5220659665 is an apocalyptic number.

It is an amenable number.

5220659665 is a deficient number, since it is larger than the sum of its proper divisors (1526039063).

5220659665 is a wasteful number, since it uses less digits than its factorization.

5220659665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80317859.

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 5220659665 is about 72254.1325115733. The cubic root of 5220659665 is about 1734.7695646920.

The spelling of 5220659665 in words is "five billion, two hundred twenty million, six hundred fifty-nine thousand, six hundred sixty-five".