1665360 has 100 divisors (see below), whose sum is σ = 5806548. Its totient is φ = 442368.

The previous prime is 1665343. The next prime is 1665421. The reversal of 1665360 is 635661.

1665360 is a `hidden beast` number, since 1 + 6 + 653 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1245456 + 419904 = 1116^2 + 648^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6352 + ... + 6608.

2^1665360 is an apocalyptic number.

1665360 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 1665360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2903274).

1665360 is an abundant number, since it is smaller than the sum of its proper divisors (4141188).

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

1665360 is a wasteful number, since it uses less digits than its factorization.

1665360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1665360 is about 1290.4882796833. The cubic root of 1665360 is about 118.5321175561.

It can be divided in two parts, 1665 and 360, that added together give a square (2025 = 45²).

The spelling of 1665360 in words is "one million, six hundred sixty-five thousand, three hundred sixty".