66116532 has 12 divisors (see below), whose sum is σ = 154271936. Its totient is φ = 22038840.

The previous prime is 66116527. The next prime is 66116539. The reversal of 66116532 is 23561166.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 66116532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66116539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2754844 + ... + 2754867.

Almost surely, 2^66116532 is an apocalyptic number.

It is an amenable number.

66116532 is an abundant number, since it is smaller than the sum of its proper divisors (88155404).

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

66116532 is a wasteful number, since it uses less digits than its factorization.

66116532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509718 (or 5509716 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 66116532 is about 8131.2072904336. The cubic root of 66116532 is about 404.3617075611.

Adding to 66116532 its reverse (23561166), we get a palindrome (89677698).

The spelling of 66116532 in words is "sixty-six million, one hundred sixteen thousand, five hundred thirty-two".