8202120665 has 16 divisors (see below), whose sum is σ = 10003658112. Its totient is φ = 6455099904.

The previous prime is 8202120653. The next prime is 8202120677. The reversal of 8202120665 is 5660212028.

It is an interprime number because it is at equal distance from previous prime (8202120653) and next prime (8202120677).

It is a cyclic number.

It is not a de Polignac number, because 8202120665 - 2⁴ = 8202120649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30362 + ... + 131628.

It is an arithmetic number, because the mean of its divisors is an integer number (625228632).

Almost surely, 2^8202120665 is an apocalyptic number.

It is an amenable number.

8202120665 is a deficient number, since it is larger than the sum of its proper divisors (1801537447).

8202120665 is a wasteful number, since it uses less digits than its factorization.

8202120665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101536.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 8202120665 is about 90565.5600380189. The cubic root of 8202120665 is about 2016.7034969786.

The spelling of 8202120665 in words is "eight billion, two hundred two million, one hundred twenty thousand, six hundred sixty-five".