66665332 has 12 divisors (see below), whose sum is σ = 116922820. Its totient is φ = 33258816.

The previous prime is 66665329. The next prime is 66665341. The reversal of 66665332 is 23356666.

It can be written as a sum of positive squares in 2 ways, for example, as 41525136 + 25140196 = 6444^2 + 5014^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66665291 and 66665300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16407 + ... + 20062.

Almost surely, 2^66665332 is an apocalyptic number.

It is an amenable number.

66665332 is a deficient number, since it is larger than the sum of its proper divisors (50257488).

66665332 is a wasteful number, since it uses less digits than its factorization.

66665332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36930 (or 36928 counting only the distinct ones).

The product of its digits is 116640, while the sum is 37.

The square root of 66665332 is about 8164.8840775604. The cubic root of 66665332 is about 405.4774271161.

The spelling of 66665332 in words is "sixty-six million, six hundred sixty-five thousand, three hundred thirty-two".