1665441336 has 128 divisors (see below), whose sum is σ = 4659681600. Its totient is φ = 492687360.

The previous prime is 1665441289. The next prime is 1665441341. The reversal of 1665441336 is 6331445661.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1665441294 and 1665441303.

It is a congruent 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, 1026606 + ... + 1028226.

Almost surely, 2^1665441336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665441336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2329840800).

1665441336 is an abundant number, since it is smaller than the sum of its proper divisors (2994240264).

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

1665441336 is a wasteful number, since it uses less digits than its factorization.

1665441336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769 (or 1765 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 1665441336 is about 40809.8191125616. The cubic root of 1665441336 is about 1185.3404722321.

Adding to 1665441336 its reverse (6331445661), we get a palindrome (7996886997).

The spelling of 1665441336 in words is "one billion, six hundred sixty-five million, four hundred forty-one thousand, three hundred thirty-six".