1665669532 has 24 divisors (see below), whose sum is σ = 2956111200. Its totient is φ = 821120256.

The previous prime is 1665669529. The next prime is 1665669539. The reversal of 1665669532 is 2359665661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665669539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121288 + ... + 134320.

It is an arithmetic number, because the mean of its divisors is an integer number (123171300).

Almost surely, 2^1665669532 is an apocalyptic number.

It is an amenable number.

1665669532 is a deficient number, since it is larger than the sum of its proper divisors (1290441668).

1665669532 is a wasteful number, since it uses less digits than its factorization.

1665669532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13485 (or 13483 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 49.

The square root of 1665669532 is about 40812.6148635443. The cubic root of 1665669532 is about 1185.3946075525.

The spelling of 1665669532 in words is "one billion, six hundred sixty-five million, six hundred sixty-nine thousand, five hundred thirty-two".