6699603440 has 80 divisors (see below), whose sum is σ = 17024981760. Its totient is φ = 2440826880.

The previous prime is 6699603439. The next prime is 6699603497. The reversal of 6699603440 is 443069966.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37295 + ... + 121614.

It is an arithmetic number, because the mean of its divisors is an integer number (212812272).

Almost surely, 2^6699603440 is an apocalyptic number.

It is an amenable number.

6699603440 is an abundant number, since it is smaller than the sum of its proper divisors (10325378320).

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

6699603440 is a wasteful number, since it uses less digits than its factorization.

6699603440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158970 (or 158964 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 6699603440 is about 81851.1053071368. The cubic root of 6699603440 is about 1885.1664364388.

The spelling of 6699603440 in words is "six billion, six hundred ninety-nine million, six hundred three thousand, four hundred forty".