6699635712 has 440 divisors, whose sum is σ = 24966849600. Its totient is φ = 1738506240.

The previous prime is 6699635671. The next prime is 6699635729. The reversal of 6699635712 is 2175369966.

6699635712 is a `hidden beast` number, since 6 + 6 + 9 + 9 + 63 + 571 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6386164 + ... + 6387212.

It is an arithmetic number, because the mean of its divisors is an integer number (56742840).

Almost surely, 2^6699635712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6699635712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12483424800).

6699635712 is an abundant number, since it is smaller than the sum of its proper divisors (18267213888).

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

6699635712 is a wasteful number, since it uses less digits than its factorization.

6699635712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1072 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 6699635712 is about 81851.3024453490. The cubic root of 6699635712 is about 1885.1694633838.

It can be divided in two parts, 6699 and 635712, that added together give a triangular number (642411 = T₁₁₃₃).

The spelling of 6699635712 in words is "six billion, six hundred ninety-nine million, six hundred thirty-five thousand, seven hundred twelve".