66313533 has 32 divisors (see below), whose sum is σ = 104412672. Its totient is φ = 36907200.

The previous prime is 66313501. The next prime is 66313537. The reversal of 66313533 is 33531366.

It is not a de Polignac number, because 66313533 - 2⁵ = 66313501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66313533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66313537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141766 + ... + 142232.

It is an arithmetic number, because the mean of its divisors is an integer number (3262896).

Almost surely, 2^66313533 is an apocalyptic number.

It is an amenable number.

66313533 is a deficient number, since it is larger than the sum of its proper divisors (38099139).

66313533 is a wasteful number, since it uses less digits than its factorization.

66313533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its digits is 14580, while the sum is 30.

The square root of 66313533 is about 8143.3121639785. The cubic root of 66313533 is about 404.7629217557.

Adding to 66313533 its reverse (33531366), we get a palindrome (99844899).

It can be divided in two parts, 663 and 13533, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 66313533 in words is "sixty-six million, three hundred thirteen thousand, five hundred thirty-three".