6669103521 has 8 divisors (see below), whose sum is σ = 8913261184. Its totient is φ = 4435507440.

The previous prime is 6669103499. The next prime is 6669103541. The reversal of 6669103521 is 1253019666.

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

It is not a de Polignac number, because 6669103521 - 2⁵ = 6669103489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6669103521.

It is not an unprimeable number, because it can be changed into a prime (6669103541) 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, 2638921 + ... + 2641446.

It is an arithmetic number, because the mean of its divisors is an integer number (1114157648).

Almost surely, 2^6669103521 is an apocalyptic number.

It is an amenable number.

6669103521 is a deficient number, since it is larger than the sum of its proper divisors (2244157663).

6669103521 is a wasteful number, since it uses less digits than its factorization.

6669103521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280791.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 6669103521 is about 81664.5793535974. The cubic root of 6669103521 is about 1882.3013465996.

The spelling of 6669103521 in words is "six billion, six hundred sixty-nine million, one hundred three thousand, five hundred twenty-one".