6699561400 has 48 divisors (see below), whose sum is σ = 17801695440. Its totient is φ = 2296992000.

The previous prime is 6699561389. The next prime is 6699561437. The reversal of 6699561400 is 41659966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2391301 + ... + 2394100.

It is an arithmetic number, because the mean of its divisors is an integer number (370868655).

Almost surely, 2^6699561400 is an apocalyptic number.

It is an amenable number.

6699561400 is an abundant number, since it is smaller than the sum of its proper divisors (11102134040).

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

6699561400 is a wasteful number, since it uses less digits than its factorization.

6699561400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785424 (or 4785415 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 6699561400 is about 81850.8484989618. The cubic root of 6699561400 is about 1885.1624932918.

The spelling of 6699561400 in words is "six billion, six hundred ninety-nine million, five hundred sixty-one thousand, four hundred".