66618032 has 40 divisors (see below), whose sum is σ = 141647184. Its totient is φ = 30161664.

The previous prime is 66618007. The next prime is 66618037. The reversal of 66618032 is 23081666.

It is a self number, because there is not a number n which added to its sum of digits gives 66618032.

It is not an unprimeable number, because it can be changed into a prime (66618037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8003 + ... + 14045.

Almost surely, 2^66618032 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 66618032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70823592).

66618032 is an abundant number, since it is smaller than the sum of its proper divisors (75029152).

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

66618032 is a wasteful number, since it uses less digits than its factorization.

66618032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117 (or 6111 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66618032 is about 8161.9870129767. The cubic root of 66618032 is about 405.3815070956.

Adding to 66618032 its reverse (23081666), we get a palindrome (89699698).

The spelling of 66618032 in words is "sixty-six million, six hundred eighteen thousand, thirty-two".