6999216000 has 512 divisors, whose sum is σ = 27282078720. Its totient is φ = 1553817600.

The previous prime is 6999215981. The next prime is 6999216001. The reversal of 6999216000 is 6129996.

It is a happy number.

It is a super-2 number, since 2×6999216000² = 97978049229312000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6999216001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12431719 + ... + 12432281.

It is an arithmetic number, because the mean of its divisors is an integer number (53285310).

Almost surely, 2^6999216000 is an apocalyptic number.

6999216000 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 6999216000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13641039360).

6999216000 is an abundant number, since it is smaller than the sum of its proper divisors (20282862720).

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

6999216000 is a wasteful number, since it uses less digits than its factorization.

6999216000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 6999216000 is about 83661.3172260633. The cubic root of 6999216000 is about 1912.8597640085.

The spelling of 6999216000 in words is "six billion, nine hundred ninety-nine million, two hundred sixteen thousand".