2664005521 has 4 divisors (see below), whose sum is σ = 2779831872. Its totient is φ = 2548179172.

The previous prime is 2664005503. The next prime is 2664005527. The reversal of 2664005521 is 1255004662.

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 a de Polignac number, because none of the positive numbers 2^k-2664005521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2664005527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57913141 + ... + 57913186.

It is an arithmetic number, because the mean of its divisors is an integer number (694957968).

Almost surely, 2^2664005521 is an apocalyptic number.

It is an amenable number.

2664005521 is a deficient number, since it is larger than the sum of its proper divisors (115826351).

2664005521 is a wasteful number, since it uses less digits than its factorization.

2664005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115826350.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2664005521 is about 51614.0050858292. The cubic root of 2664005521 is about 1386.2611113355.

The spelling of 2664005521 in words is "two billion, six hundred sixty-four million, five thousand, five hundred twenty-one".