6658712320 has 144 divisors (see below), whose sum is σ = 18187757280. Its totient is φ = 2313879552.

The previous prime is 6658712309. The next prime is 6658712323. The reversal of 6658712320 is 232178566.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6658712323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271111 + ... + 294649.

It is an arithmetic number, because the mean of its divisors is an integer number (126303870).

Almost surely, 2^6658712320 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 6658712320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9093878640).

6658712320 is an abundant number, since it is smaller than the sum of its proper divisors (11529044960).

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

6658712320 is a wasteful number, since it uses less digits than its factorization.

6658712320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23590 (or 23576 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 6658712320 is about 81600.9333279957. The cubic root of 6658712320 is about 1881.3232271802.

The spelling of 6658712320 in words is "six billion, six hundred fifty-eight million, seven hundred twelve thousand, three hundred twenty".