2027666665 has 4 divisors (see below), whose sum is σ = 2433200004. Its totient is φ = 1622133328.

The previous prime is 2027666623. The next prime is 2027666671. The reversal of 2027666665 is 5666667202.

It is a happy number.

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 207705744 + 1819960921 = 14412^2 + 42661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2027666665 - 2²⁷ = 1893448937 is a prime.

It is a super-2 number, since 2×2027666665² = 8222864208704444450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202766662 + ... + 202766671.

It is an arithmetic number, because the mean of its divisors is an integer number (608300001).

Almost surely, 2^2027666665 is an apocalyptic number.

It is an amenable number.

2027666665 is a deficient number, since it is larger than the sum of its proper divisors (405533339).

2027666665 is an equidigital number, since it uses as much as digits as its factorization.

2027666665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405533338.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The square root of 2027666665 is about 45029.6198629302. The cubic root of 2027666665 is about 1265.7041006214.

The spelling of 2027666665 in words is "two billion, twenty-seven million, six hundred sixty-six thousand, six hundred sixty-five".