6625339521 has 8 divisors (see below), whose sum is σ = 8921249664. Its totient is φ = 4373161200.

The previous prime is 6625339519. The next prime is 6625339529. The reversal of 6625339521 is 1259335266.

It is a happy number.

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

It is not a de Polignac number, because 6625339521 - 2¹ = 6625339519 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6625339529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10932601 + ... + 10933206.

It is an arithmetic number, because the mean of its divisors is an integer number (1115156208).

Almost surely, 2^6625339521 is an apocalyptic number.

It is an amenable number.

6625339521 is a deficient number, since it is larger than the sum of its proper divisors (2295910143).

6625339521 is a wasteful number, since it uses less digits than its factorization.

6625339521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21865911.

The product of its digits is 291600, while the sum is 42.

The square root of 6625339521 is about 81396.1886147011. The cubic root of 6625339521 is about 1878.1749605347.

The spelling of 6625339521 in words is "six billion, six hundred twenty-five million, three hundred thirty-nine thousand, five hundred twenty-one".