13166720 has 64 divisors (see below), whose sum is σ = 35985600. Its totient is φ = 4512768.

The previous prime is 13166719. The next prime is 13166731. The reversal of 13166720 is 2766131.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 13166720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3011 + ... + 5949.

It is an arithmetic number, because the mean of its divisors is an integer number (562275).

Almost surely, 2^13166720 is an apocalyptic number.

13166720 is a gapful number since it is divisible by the number (10) 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 13166720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17992800).

13166720 is an abundant number, since it is smaller than the sum of its proper divisors (22818880).

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

13166720 is an equidigital number, since it uses as much as digits as its factorization.

13166720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 13166720 is about 3628.5975252155. The cubic root of 13166720 is about 236.1343676080.

The spelling of 13166720 in words is "thirteen million, one hundred sixty-six thousand, seven hundred twenty".