2666514665 has 4 divisors (see below), whose sum is σ = 3199817604. Its totient is φ = 2133211728.

The previous prime is 2666514659. The next prime is 2666514673. The reversal of 2666514665 is 5664156662.

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 1169366416 + 1497148249 = 34196^2 + 38693^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666514665 - 2¹⁶ = 2666449129 is a prime.

It is a super-2 number, since 2×2666514665² = 14220600917320124450, 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, 266651462 + ... + 266651471.

It is an arithmetic number, because the mean of its divisors is an integer number (799954401).

Almost surely, 2^2666514665 is an apocalyptic number.

It is an amenable number.

2666514665 is a deficient number, since it is larger than the sum of its proper divisors (533302939).

2666514665 is an equidigital number, since it uses as much as digits as its factorization.

2666514665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533302938.

The product of its digits is 1555200, while the sum is 47.

The square root of 2666514665 is about 51638.3061786500. The cubic root of 2666514665 is about 1386.6962001833.

The spelling of 2666514665 in words is "two billion, six hundred sixty-six million, five hundred fourteen thousand, six hundred sixty-five".