6699135960 has 480 divisors, whose sum is σ = 25324790400. Its totient is φ = 1533312000.

The previous prime is 6699135959. The next prime is 6699136013. The reversal of 6699135960 is 695319966.

It is a happy number.

It is a super-2 number, since 2×6699135960² = 89756845221130243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6699135897 and 6699135906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 163393540 + ... + 163393580.

It is an arithmetic number, because the mean of its divisors is an integer number (52759980).

Almost surely, 2^6699135960 is an apocalyptic number.

6699135960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6699135960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12662395200).

6699135960 is an abundant number, since it is smaller than the sum of its proper divisors (18625654440).

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

6699135960 is a wasteful number, since it uses less digits than its factorization.

6699135960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 54.

The square root of 6699135960 is about 81848.2495842153. The cubic root of 6699135960 is about 1885.1225881667.

The spelling of 6699135960 in words is "six billion, six hundred ninety-nine million, one hundred thirty-five thousand, nine hundred sixty".