14721660 has 108 divisors (see below), whose sum is σ = 47604648. Its totient is φ = 3681792.

The previous prime is 14721611. The next prime is 14721661. The reversal of 14721660 is 6612741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14721661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51879 + ... + 52161.

Almost surely, 2^14721660 is an apocalyptic number.

14721660 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 14721660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23802324).

14721660 is an abundant number, since it is smaller than the sum of its proper divisors (32882988).

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

14721660 is a wasteful number, since it uses less digits than its factorization.

14721660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 14721660 is about 3836.8815462560. The cubic root of 14721660 is about 245.0862392504.

The spelling of 14721660 in words is "fourteen million, seven hundred twenty-one thousand, six hundred sixty".