66135432 has 64 divisors (see below), whose sum is σ = 183110400. Its totient is φ = 19736640.

The previous prime is 66135427. The next prime is 66135437. The reversal of 66135432 is 23453166.

It is an interprime number because it is at equal distance from previous prime (66135427) and next prime (66135437).

It is a self number, because there is not a number n which added to its sum of digits gives 66135432.

It is not an unprimeable number, because it can be changed into a prime (66135437) 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, 15819 + ... + 19557.

It is an arithmetic number, because the mean of its divisors is an integer number (2861100).

Almost surely, 2^66135432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66135432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91555200).

66135432 is an abundant number, since it is smaller than the sum of its proper divisors (116974968).

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

66135432 is a wasteful number, since it uses less digits than its factorization.

66135432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826 (or 3822 counting only the distinct ones).

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

The square root of 66135432 is about 8132.3693964305. The cubic root of 66135432 is about 404.4002340230.

Adding to 66135432 its reverse (23453166), we get a palindrome (89588598).

The spelling of 66135432 in words is "sixty-six million, one hundred thirty-five thousand, four hundred thirty-two".