6990520320 has 840 divisors, whose sum is σ = 29830297464. Its totient is φ = 1560674304.

The previous prime is 6990520291. The next prime is 6990520331. The reversal of 6990520320 is 230250996.

It is a tau number, because it is divible by the number of its divisors (840).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 162570219 + ... + 162570261.

Almost surely, 2^6990520320 is an apocalyptic number.

6990520320 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 6990520320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14915148732).

6990520320 is an abundant number, since it is smaller than the sum of its proper divisors (22839777144).

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

6990520320 is an equidigital number, since it uses as much as digits as its factorization.

6990520320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 6990520320 is about 83609.3315366174. The cubic root of 6990520320 is about 1912.0672700316.

The spelling of 6990520320 in words is "six billion, nine hundred ninety million, five hundred twenty thousand, three hundred twenty".