66454533 has 32 divisors (see below), whose sum is σ = 104227200. Its totient is φ = 41731200.

The previous prime is 66454529. The next prime is 66454561. The reversal of 66454533 is 33545466.

66454533 is a `hidden beast` number, since 6 + 645 + 4 + 5 + 3 + 3 = 666.

It is not a de Polignac number, because 66454533 - 2² = 66454529 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66454433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143923 + ... + 144383.

It is an arithmetic number, because the mean of its divisors is an integer number (3257100).

Almost surely, 2^66454533 is an apocalyptic number.

It is an amenable number.

66454533 is a deficient number, since it is larger than the sum of its proper divisors (37772667).

66454533 is a wasteful number, since it uses less digits than its factorization.

66454533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 66454533 is about 8151.9649778443. The cubic root of 66454533 is about 405.0495961210.

Adding to 66454533 its reverse (33545466), we get a palindrome (99999999).

The spelling of 66454533 in words is "sixty-six million, four hundred fifty-four thousand, five hundred thirty-three".