2660571609 has 4 divisors (see below), whose sum is σ = 3547428816. Its totient is φ = 1773714404.

The previous prime is 2660571601. The next prime is 2660571611. The reversal of 2660571609 is 9061750662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2660571609 - 2³ = 2660571601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2660571601) 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, 443428599 + ... + 443428604.

It is an arithmetic number, because the mean of its divisors is an integer number (886857204).

Almost surely, 2^2660571609 is an apocalyptic number.

It is an amenable number.

2660571609 is a deficient number, since it is larger than the sum of its proper divisors (886857207).

2660571609 is an equidigital number, since it uses as much as digits as its factorization.

2660571609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886857206.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 2660571609 is about 51580.7290468058. The cubic root of 2660571609 is about 1385.6652234966.

The spelling of 2660571609 in words is "two billion, six hundred sixty million, five hundred seventy-one thousand, six hundred nine".