6643362444 has 24 divisors (see below), whose sum is σ = 15579870768. Its totient is φ = 2203212480.

The previous prime is 6643362377. The next prime is 6643362461. The reversal of 6643362444 is 4442633466.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6643362396 and 6643362405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402747 + ... + 1407474.

It is an arithmetic number, because the mean of its divisors is an integer number (649161282).

Almost surely, 2^6643362444 is an apocalyptic number.

It is an amenable number.

6643362444 is an abundant number, since it is smaller than the sum of its proper divisors (8936508324).

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

6643362444 is a wasteful number, since it uses less digits than its factorization.

6643362444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810425 (or 2810423 counting only the distinct ones).

The product of its digits is 995328, while the sum is 42.

The square root of 6643362444 is about 81506.8245240851. The cubic root of 6643362444 is about 1879.8764861513.

The spelling of 6643362444 in words is "six billion, six hundred forty-three million, three hundred sixty-two thousand, four hundred forty-four".