14066640 has 120 divisors (see below), whose sum is σ = 54008448. Its totient is φ = 3214080.

The previous prime is 14066627. The next prime is 14066641. The reversal of 14066640 is 4666041.

14066640 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14066641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3645 + ... + 6435.

Almost surely, 2^14066640 is an apocalyptic number.

14066640 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 14066640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27004224).

14066640 is an abundant number, since it is smaller than the sum of its proper divisors (39941808).

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

14066640 is a wasteful number, since it uses less digits than its factorization.

14066640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 14066640 is about 3750.5519593788. The cubic root of 14066640 is about 241.3960305002.

It can be divided in two parts, 14066 and 640, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 14066640 in words is "fourteen million, sixty-six thousand, six hundred forty".