1665835223 has 12 divisors (see below), whose sum is σ = 1812794760. Its totient is φ = 1521729792.

The previous prime is 1665835217. The next prime is 1665835231. The reversal of 1665835223 is 3225385661.

It is a de Polignac number, because none of the positive numbers 2^k-1665835223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665835823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115508 + ... + 129126.

It is an arithmetic number, because the mean of its divisors is an integer number (151066230).

Almost surely, 2^1665835223 is an apocalyptic number.

1665835223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1665835223 is a deficient number, since it is larger than the sum of its proper divisors (146959537).

1665835223 is an equidigital number, since it uses as much as digits as its factorization.

1665835223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13826 (or 13729 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 1665835223 is about 40814.6447124068. The cubic root of 1665835223 is about 1185.4339116085.

The spelling of 1665835223 in words is "one billion, six hundred sixty-five million, eight hundred thirty-five thousand, two hundred twenty-three".