6531660228 has 48 divisors (see below), whose sum is σ = 15383567360. Its totient is φ = 2156868000.

The previous prime is 6531660211. The next prime is 6531660241. The reversal of 6531660228 is 8220661356.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681993 + ... + 691503.

Almost surely, 2^6531660228 is an apocalyptic number.

It is an amenable number.

6531660228 is an abundant number, since it is smaller than the sum of its proper divisors (8851907132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6531660228 is a wasteful number, since it uses less digits than its factorization.

6531660228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10048 (or 10046 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 6531660228 is about 80818.6873687020. The cubic root of 6531660228 is about 1869.2807273128.

The spelling of 6531660228 in words is "six billion, five hundred thirty-one million, six hundred sixty thousand, two hundred twenty-eight".