8660720 has 40 divisors (see below), whose sum is σ = 20425776. Its totient is φ = 3414528.

The previous prime is 8660699. The next prime is 8660723. The reversal of 8660720 is 270668.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8660723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5099 + ... + 6581.

Almost surely, 2^8660720 is an apocalyptic number.

8660720 is a gapful number since it is divisible by the number (80) 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 8660720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10212888).

8660720 is an abundant number, since it is smaller than the sum of its proper divisors (11765056).

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

8660720 is a wasteful number, since it uses less digits than its factorization.

8660720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 8660720 is about 2942.9101243497. The cubic root of 8660720 is about 205.3610136781.

It can be divided in two parts, 86 and 60720, that added together give a palindrome (60806).

The spelling of 8660720 in words is "eight million, six hundred sixty thousand, seven hundred twenty".