666632442432 has 112 divisors (see below), whose sum is σ = 1925763780672. Its totient is φ = 201839738880.

The previous prime is 666632442409. The next prime is 666632442433. The reversal of 666632442432 is 234244236666.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (666632442433) 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, 2387328 + ... + 2651904.

Almost surely, 2^666632442432 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 666632442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962881890336).

666632442432 is an abundant number, since it is smaller than the sum of its proper divisors (1259131338240).

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

666632442432 is a wasteful number, since it uses less digits than its factorization.

666632442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265796 (or 265786 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 48.

The spelling of 666632442432 in words is "six hundred sixty-six billion, six hundred thirty-two million, four hundred forty-two thousand, four hundred thirty-two".