6990161328 has 120 divisors (see below), whose sum is σ = 20317564176. Its totient is φ = 2326579200.

The previous prime is 6990161327. The next prime is 6990161359. The reversal of 6990161328 is 8231610996.

It is a happy number.

6990161328 is a `hidden beast` number, since 6 + 9 + 9 + 0 + 1 + 613 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990161327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5135368 + ... + 5136728.

Almost surely, 2^6990161328 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 6990161328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10158782088).

6990161328 is an abundant number, since it is smaller than the sum of its proper divisors (13327402848).

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

6990161328 is a wasteful number, since it uses less digits than its factorization.

6990161328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 6990161328 is about 83607.1846673478. The cubic root of 6990161328 is about 1912.0345386290.

The spelling of 6990161328 in words is "six billion, nine hundred ninety million, one hundred sixty-one thousand, three hundred twenty-eight".