10665440 has 48 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 4231680.

The previous prime is 10665437. The next prime is 10665451. The reversal of 10665440 is 4456601.

It is a happy number.

10665440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10665440² = 227503220787200, which contains 22 as substring.

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, 30386 + ... + 30734.

It is an arithmetic number, because the mean of its divisors is an integer number (529200).

Almost surely, 2^10665440 is an apocalyptic number.

10665440 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 10665440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12700800).

10665440 is an abundant number, since it is smaller than the sum of its proper divisors (14736160).

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

10665440 is a wasteful number, since it uses less digits than its factorization.

10665440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 10665440 is about 3265.7985240979. The cubic root of 10665440 is about 220.1200446776.

The spelling of 10665440 in words is "ten million, six hundred sixty-five thousand, four hundred forty".