6660521222 has 8 divisors (see below), whose sum is σ = 10578474936. Its totient is φ = 3134362912.

The previous prime is 6660521221. The next prime is 6660521251. The reversal of 6660521222 is 2221250666.

6660521222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660521221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97948808 + ... + 97948875.

It is an arithmetic number, because the mean of its divisors is an integer number (1322309367).

Almost surely, 2^6660521222 is an apocalyptic number.

6660521222 is a deficient number, since it is larger than the sum of its proper divisors (3917953714).

6660521222 is a wasteful number, since it uses less digits than its factorization.

6660521222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195897702.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6660521222 is about 81612.0164068993. The cubic root of 6660521222 is about 1881.4935714884.

Adding to 6660521222 its reverse (2221250666), we get a palindrome (8881771888).

The spelling of 6660521222 in words is "six billion, six hundred sixty million, five hundred twenty-one thousand, two hundred twenty-two".