6699199928 has 32 divisors (see below), whose sum is σ = 13429035360. Its totient is φ = 3121950720.

The previous prime is 6699199919. The next prime is 6699199931. The reversal of 6699199928 is 8299919966.

It is a Harshad number since it is a multiple of its sum of digits (68).

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 7 ways as a sum of consecutive naturals, for example, 225113 + ... + 253128.

It is an arithmetic number, because the mean of its divisors is an integer number (419657355).

Almost surely, 2^6699199928 is an apocalyptic number.

6699199928 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6699199928 is an abundant number, since it is smaller than the sum of its proper divisors (6729835432).

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

6699199928 is a wasteful number, since it uses less digits than its factorization.

6699199928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478367 (or 478363 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 68.

The square root of 6699199928 is about 81848.6403552313. The cubic root of 6699199928 is about 1885.1285883006.

The spelling of 6699199928 in words is "six billion, six hundred ninety-nine million, one hundred ninety-nine thousand, nine hundred twenty-eight".