6211022665 has 4 divisors (see below), whose sum is σ = 7453227204. Its totient is φ = 4968818128.

The previous prime is 6211022663. The next prime is 6211022681. The reversal of 6211022665 is 5662201126.

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 4312154889 + 1898867776 = 65667^2 + 43576^2 .

It is a cyclic number.

It is not a de Polignac number, because 6211022665 - 2¹ = 6211022663 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6211022663) 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 3 ways as a sum of consecutive naturals, for example, 621102262 + ... + 621102271.

It is an arithmetic number, because the mean of its divisors is an integer number (1863306801).

Almost surely, 2^6211022665 is an apocalyptic number.

It is an amenable number.

6211022665 is a deficient number, since it is larger than the sum of its proper divisors (1242204539).

6211022665 is a wasteful number, since it uses less digits than its factorization.

6211022665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242204538.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 6211022665 is about 78810.0416507947. The cubic root of 6211022665 is about 1838.1785954594.

The spelling of 6211022665 in words is "six billion, two hundred eleven million, twenty-two thousand, six hundred sixty-five".