1665363 has 12 divisors (see below), whose sum is σ = 2583240. Its totient is φ = 951552.

The previous prime is 1665343. The next prime is 1665421. The reversal of 1665363 is 3635661.

It is not a de Polignac number, because 1665363 - 2⁸ = 1665107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1665363.

It is not an unprimeable number, because it can be changed into a prime (1665343) 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 11 ways as a sum of consecutive naturals, for example, 5518 + ... + 5811.

It is an arithmetic number, because the mean of its divisors is an integer number (215270).

2^1665363 is an apocalyptic number.

1665363 is a deficient number, since it is larger than the sum of its proper divisors (917877).

1665363 is a wasteful number, since it uses less digits than its factorization.

1665363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11346 (or 11339 counting only the distinct ones).

The product of its digits is 9720, while the sum is 30.

The square root of 1665363 is about 1290.4894420335. The cubic root of 1665363 is about 118.5321887311.

The spelling of 1665363 in words is "one million, six hundred sixty-five thousand, three hundred sixty-three".