66524533 has 4 divisors (see below), whose sum is σ = 69416928. Its totient is φ = 63632140.

The previous prime is 66524531. The next prime is 66524537. The reversal of 66524533 is 33542566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33542566 = 2 ⋅16771283.

It is a cyclic number.

It is not a de Polignac number, because 66524533 - 2¹ = 66524531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66524531) 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, 1446163 + ... + 1446208.

It is an arithmetic number, because the mean of its divisors is an integer number (17354232).

Almost surely, 2^66524533 is an apocalyptic number.

It is an amenable number.

66524533 is a deficient number, since it is larger than the sum of its proper divisors (2892395).

66524533 is a wasteful number, since it uses less digits than its factorization.

66524533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892394.

The product of its digits is 64800, while the sum is 34.

The square root of 66524533 is about 8156.2572911845. The cubic root of 66524533 is about 405.1917661174.

The spelling of 66524533 in words is "sixty-six million, five hundred twenty-four thousand, five hundred thirty-three".