2666545565 has 8 divisors (see below), whose sum is σ = 3238407648. Its totient is φ = 2107534480.

The previous prime is 2666545547. The next prime is 2666545573. The reversal of 2666545565 is 5655456662.

2666545565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2666545565 - 2²² = 2662351261 is a prime.

It is a super-2 number, since 2×2666545565² = 14220930500442338450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3212291 + ... + 3213120.

It is an arithmetic number, because the mean of its divisors is an integer number (404800956).

Almost surely, 2^2666545565 is an apocalyptic number.

It is an amenable number.

2666545565 is a deficient number, since it is larger than the sum of its proper divisors (571862083).

2666545565 is an equidigital number, since it uses as much as digits as its factorization.

2666545565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425499.

The product of its digits is 6480000, while the sum is 50.

The square root of 2666545565 is about 51638.6053742740. The cubic root of 2666545565 is about 1386.7015565820.

The spelling of 2666545565 in words is "two billion, six hundred sixty-six million, five hundred forty-five thousand, five hundred sixty-five".