66505532 has 12 divisors (see below), whose sum is σ = 116501616. Its totient is φ = 33219360.

The previous prime is 66505531. The next prime is 66505559. The reversal of 66505532 is 23550566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66505531) by changing a digit.

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, 3569 + ... + 12072.

It is an arithmetic number, because the mean of its divisors is an integer number (9708468).

Almost surely, 2^66505532 is an apocalyptic number.

It is an amenable number.

66505532 is a deficient number, since it is larger than the sum of its proper divisors (49996084).

66505532 is a wasteful number, since it uses less digits than its factorization.

66505532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16708 (or 16706 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 66505532 is about 8155.0923967788. The cubic root of 66505532 is about 405.1531849528.

The spelling of 66505532 in words is "sixty-six million, five hundred five thousand, five hundred thirty-two".