6566551550065 has 8 divisors (see below), whose sum is σ = 8486005080168. Its totient is φ = 4849145760000.

The previous prime is 6566551550047. The next prime is 6566551550123. The reversal of 6566551550065 is 5600551556656.

It can be written as a sum of positive squares in 4 ways, for example, as 286079498496 + 6280472051569 = 534864^2 + 2506087^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-6566551550065 is a prime.

It is a super-2 number, since 2×6566551550065² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6566551549988 and 6566551550015.

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, 50511934936 + ... + 50511935065.

It is an arithmetic number, because the mean of its divisors is an integer number (1060750635021).

Almost surely, 2^{6566551550065} is an apocalyptic number.

6566551550065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6566551550065 is a deficient number, since it is larger than the sum of its proper divisors (1919453530103).

6566551550065 is a wasteful number, since it uses less digits than its factorization.

6566551550065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101023870019.

The product of its (nonzero) digits is 20250000, while the sum is 55.

The spelling of 6566551550065 in words is "six trillion, five hundred sixty-six billion, five hundred fifty-one million, five hundred fifty thousand, sixty-five".