2666651065 has 32 divisors (see below), whose sum is σ = 3592512000. Its totient is φ = 1886626560.

The previous prime is 2666651041. The next prime is 2666651081. The reversal of 2666651065 is 5601566662.

It is not a de Polignac number, because 2666651065 - 2²⁵ = 2633096633 is a prime.

It is a super-2 number, since 2×2666651065² = 14222055804931268450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241536 + ... + 252334.

It is an arithmetic number, because the mean of its divisors is an integer number (112266000).

Almost surely, 2^2666651065 is an apocalyptic number.

It is an amenable number.

2666651065 is a deficient number, since it is larger than the sum of its proper divisors (925860935).

2666651065 is a wasteful number, since it uses less digits than its factorization.

2666651065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10977.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 2666651065 is about 51639.6268867233. The cubic root of 2666651065 is about 1386.7198442981.

The spelling of 2666651065 in words is "two billion, six hundred sixty-six million, six hundred fifty-one thousand, sixty-five".