66413532 has 24 divisors (see below), whose sum is σ = 159964672. Its totient is φ = 21423600.

The previous prime is 66413521. The next prime is 66413537. The reversal of 66413532 is 23531466.

It is a self number, because there is not a number n which added to its sum of digits gives 66413532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66413537) 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 7 ways as a sum of consecutive naturals, for example, 88894 + ... + 89637.

Almost surely, 2^66413532 is an apocalyptic number.

66413532 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66413532 is an abundant number, since it is smaller than the sum of its proper divisors (93551140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66413532 is a wasteful number, since it uses less digits than its factorization.

66413532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178569 (or 178567 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 66413532 is about 8149.4497973790. The cubic root of 66413532 is about 404.9662767226.

Adding to 66413532 its reverse (23531466), we get a palindrome (89944998).

It can be divided in two parts, 664 and 13532, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 66413532 in words is "sixty-six million, four hundred thirteen thousand, five hundred thirty-two".