6660190656 has 196 divisors, whose sum is σ = 22647292272. Its totient is φ = 1902818304.

The previous prime is 6660190591. The next prime is 6660190679. The reversal of 6660190656 is 6560910666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 316396 + ... + 336788.

Almost surely, 2^6660190656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6660190656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11323646136).

6660190656 is an abundant number, since it is smaller than the sum of its proper divisors (15987101616).

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

6660190656 is an equidigital number, since it uses as much as digits as its factorization.

6660190656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430 (or 20405 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 6660190656 is about 81609.9911530445. The cubic root of 6660190656 is about 1881.4624443902.

The spelling of 6660190656 in words is "six billion, six hundred sixty million, one hundred ninety thousand, six hundred fifty-six".