1663065 has 32 divisors (see below), whose sum is σ = 3010560. Its totient is φ = 870912.

The previous prime is 1663031. The next prime is 1663073. The reversal of 1663065 is 5603661.

It is not a de Polignac number, because 1663065 - 2⁹ = 1662553 is a prime.

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13032 + ... + 13158.

It is an arithmetic number, because the mean of its divisors is an integer number (94080).

2^1663065 is an apocalyptic number.

1663065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1663065 is a deficient number, since it is larger than the sum of its proper divisors (1347495).

1663065 is a wasteful number, since it uses less digits than its factorization.

1663065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 232 counting only the distinct ones).

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

The square root of 1663065 is about 1289.5987748133. The cubic root of 1663065 is about 118.4776435953.

The spelling of 1663065 in words is "one million, six hundred sixty-three thousand, sixty-five".