66325632 has 64 divisors (see below), whose sum is σ = 178385760. Its totient is φ = 21831680.

The previous prime is 66325579. The next prime is 66325643. The reversal of 66325632 is 23652366.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 66325593 and 66325602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30832 + ... + 32912.

Almost surely, 2^66325632 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 66325632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89192880).

66325632 is an abundant number, since it is smaller than the sum of its proper divisors (112060128).

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

66325632 is a wasteful number, since it uses less digits than its factorization.

66325632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181 (or 2169 counting only the distinct ones).

The product of its digits is 38880, while the sum is 33.

The square root of 66325632 is about 8144.0550096374. The cubic root of 66325632 is about 404.7875367855.

Adding to 66325632 its reverse (23652366), we get a palindrome (89977998).

The spelling of 66325632 in words is "sixty-six million, three hundred twenty-five thousand, six hundred thirty-two".