8320518665 has 16 divisors (see below), whose sum is σ = 10592901120. Its totient is φ = 6256414080.

The previous prime is 8320518631. The next prime is 8320518667. The reversal of 8320518665 is 5668150238.

It is not a de Polignac number, because 8320518665 - 2¹⁸ = 8320256521 is a prime.

It is a super-2 number, since 2×8320518665² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8320518667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 332756 + ... + 356885.

It is an arithmetic number, because the mean of its divisors is an integer number (662056320).

Almost surely, 2^8320518665 is an apocalyptic number.

It is an amenable number.

8320518665 is a deficient number, since it is larger than the sum of its proper divisors (2272382455).

8320518665 is a wasteful number, since it uses less digits than its factorization.

8320518665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689792.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 8320518665 is about 91216.8770842326. The cubic root of 8320518665 is about 2026.3609133617.

The spelling of 8320518665 in words is "eight billion, three hundred twenty million, five hundred eighteen thousand, six hundred sixty-five".