66534572 has 12 divisors (see below), whose sum is σ = 125392176. Its totient is φ = 30708240.

The previous prime is 66534571. The next prime is 66534577. The reversal of 66534572 is 27543566.

It is not an unprimeable number, because it can be changed into a prime (66534571) 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, 639704 + ... + 639807.

It is an arithmetic number, because the mean of its divisors is an integer number (10449348).

Almost surely, 2^66534572 is an apocalyptic number.

It is an amenable number.

66534572 is a deficient number, since it is larger than the sum of its proper divisors (58857604).

66534572 is a wasteful number, since it uses less digits than its factorization.

66534572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279528 (or 1279526 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 66534572 is about 8156.8726850430. The cubic root of 66534572 is about 405.2121471476.

The spelling of 66534572 in words is "sixty-six million, five hundred thirty-four thousand, five hundred seventy-two".