66106533 has 16 divisors (see below), whose sum is σ = 89398400. Its totient is φ = 43447104.

The previous prime is 66106519. The next prime is 66106559. The reversal of 66106533 is 33560166.

It is not a de Polignac number, because 66106533 - 2⁵ = 66106501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66106533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66106583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107535 + ... + 108147.

It is an arithmetic number, because the mean of its divisors is an integer number (5587400).

Almost surely, 2^66106533 is an apocalyptic number.

It is an amenable number.

66106533 is a deficient number, since it is larger than the sum of its proper divisors (23291867).

66106533 is a wasteful number, since it uses less digits than its factorization.

66106533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 66106533 is about 8130.5924138405. The cubic root of 66106533 is about 404.3413222584.

Adding to 66106533 its reverse (33560166), we get a palindrome (99666699).

The spelling of 66106533 in words is "sixty-six million, one hundred six thousand, five hundred thirty-three".