6643461366 has 24 divisors (see below), whose sum is σ = 14401339680. Its totient is φ = 2213383536.

The previous prime is 6643461329. The next prime is 6643461431. The reversal of 6643461366 is 6631643466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54430 + ... + 127473.

It is an arithmetic number, because the mean of its divisors is an integer number (600055820).

Almost surely, 2^6643461366 is an apocalyptic number.

6643461366 is an abundant number, since it is smaller than the sum of its proper divisors (7757878314).

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

6643461366 is a wasteful number, since it uses less digits than its factorization.

6643461366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183940 (or 183937 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 45.

The square root of 6643461366 is about 81507.4313544477. The cubic root of 6643461366 is about 1879.8858167787.

The spelling of 6643461366 in words is "six billion, six hundred forty-three million, four hundred sixty-one thousand, three hundred sixty-six".