2665535659 has 4 divisors (see below), whose sum is σ = 2665777104. Its totient is φ = 2665294216.

The previous prime is 2665535647. The next prime is 2665535681. The reversal of 2665535659 is 9565355662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2665535659 - 2⁵ = 2665535627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665532659) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103327 + ... + 126520.

It is an arithmetic number, because the mean of its divisors is an integer number (666444276).

Almost surely, 2^2665535659 is an apocalyptic number.

2665535659 is a deficient number, since it is larger than the sum of its proper divisors (241445).

2665535659 is a wasteful number, since it uses less digits than its factorization.

2665535659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241444.

The product of its digits is 7290000, while the sum is 52.

The square root of 2665535659 is about 51628.8258533932. The cubic root of 2665535659 is about 1386.5264717488.

The spelling of 2665535659 in words is "two billion, six hundred sixty-five million, five hundred thirty-five thousand, six hundred fifty-nine".