8664525509 has 4 divisors (see below), whose sum is σ = 8671095840. Its totient is φ = 8657955180.

The previous prime is 8664525487. The next prime is 8664525517. The reversal of 8664525509 is 9055254668.

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 8664525509 - 2¹² = 8664521413 is a prime.

It is a super-2 number, since 2×8664525509² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664525409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3283187 + ... + 3285824.

It is an arithmetic number, because the mean of its divisors is an integer number (2167773960).

Almost surely, 2^8664525509 is an apocalyptic number.

It is an amenable number.

8664525509 is a deficient number, since it is larger than the sum of its proper divisors (6570331).

8664525509 is a wasteful number, since it uses less digits than its factorization.

8664525509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570330.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The square root of 8664525509 is about 93083.4330533635. The cubic root of 8664525509 is about 2053.9108772693.

The spelling of 8664525509 in words is "eight billion, six hundred sixty-four million, five hundred twenty-five thousand, five hundred nine".