66291332 has 12 divisors (see below), whose sum is σ = 120010380. Its totient is φ = 32002656.

The previous prime is 66291331. The next prime is 66291343. The reversal of 66291332 is 23319266.

66291332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19149376 + 47141956 = 4376^2 + 6866^2 .

It is not an unprimeable number, because it can be changed into a prime (66291331) 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 3 ways as a sum of consecutive naturals, for example, 285623 + ... + 285854.

It is an arithmetic number, because the mean of its divisors is an integer number (10000865).

Almost surely, 2^66291332 is an apocalyptic number.

It is an amenable number.

66291332 is a deficient number, since it is larger than the sum of its proper divisors (53719048).

66291332 is a wasteful number, since it uses less digits than its factorization.

66291332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571510 (or 571508 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 66291332 is about 8141.9489067422. The cubic root of 66291332 is about 404.7177467402.

The spelling of 66291332 in words is "sixty-six million, two hundred ninety-one thousand, three hundred thirty-two".