2021410665 has 24 divisors (see below), whose sum is σ = 3688189440. Its totient is φ = 1021343904.

The previous prime is 2021410553. The next prime is 2021410673. The reversal of 2021410665 is 5660141202.

It is not a de Polignac number, because 2021410665 - 2¹⁴ = 2021394281 is a prime.

It is a super-2 number, since 2×2021410665² = 8172202153151484450, which contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1181257 + ... + 1182966.

It is an arithmetic number, because the mean of its divisors is an integer number (153674560).

Almost surely, 2^2021410665 is an apocalyptic number.

It is an amenable number.

2021410665 is a deficient number, since it is larger than the sum of its proper divisors (1666778775).

2021410665 is a wasteful number, since it uses less digits than its factorization.

2021410665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364253 (or 2364250 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2021410665 is about 44960.1008117197. The cubic root of 2021410665 is about 1264.4010589830.

Adding to 2021410665 its reverse (5660141202), we get a palindrome (7681551867).

It can be divided in two parts, 2021 and 410665, that added together give a triangular number (412686 = T₉₀₈).

The spelling of 2021410665 in words is "two billion, twenty-one million, four hundred ten thousand, six hundred sixty-five".