6699816240 has 160 divisors (see below), whose sum is σ = 22887701760. Its totient is φ = 1610800128.

The previous prime is 6699816223. The next prime is 6699816247. The reversal of 6699816240 is 426189966.

It is not an unprimeable number, because it can be changed into a prime (6699816247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109191 + ... + 159129.

It is an arithmetic number, because the mean of its divisors is an integer number (143048136).

Almost surely, 2^6699816240 is an apocalyptic number.

6699816240 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 6699816240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11443850880).

6699816240 is an abundant number, since it is smaller than the sum of its proper divisors (16187885520).

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

6699816240 is a wasteful number, since it uses less digits than its factorization.

6699816240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50011 (or 50005 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 6699816240 is about 81852.4052181730. The cubic root of 6699816240 is about 1885.1863957878.

It can be divided in two parts, 66998 and 16240, that added together give a palindrome (83238).

The spelling of 6699816240 in words is "six billion, six hundred ninety-nine million, eight hundred sixteen thousand, two hundred forty".