6909986880 has 392 divisors, whose sum is σ = 25985419200. Its totient is φ = 1744561152.

The previous prime is 6909986873. The next prime is 6909986887. The reversal of 6909986880 is 886899096.

It is an interprime number because it is at equal distance from previous prime (6909986873) and next prime (6909986887).

It is not an unprimeable number, because it can be changed into a prime (6909986887) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4431541 + ... + 4433099.

Almost surely, 2^6909986880 is an apocalyptic number.

6909986880 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 6909986880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12992709600).

6909986880 is an abundant number, since it is smaller than the sum of its proper divisors (19075432320).

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

6909986880 is a wasteful number, since it uses less digits than its factorization.

6909986880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1588 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 63.

The square root of 6909986880 is about 83126.3308464893. The cubic root of 6909986880 is about 1904.6963121825.

The spelling of 6909986880 in words is "six billion, nine hundred nine million, nine hundred eighty-six thousand, eight hundred eighty".