660432432 has 160 divisors (see below), whose sum is σ = 1941018624. Its totient is φ = 191692800.

The previous prime is 660432431. The next prime is 660432491. The reversal of 660432432 is 234234066.

It is a happy number.

660432432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 660432432.

It is not an unprimeable number, because it can be changed into a prime (660432431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2569648 + ... + 2569904.

Almost surely, 2^660432432 is an apocalyptic number.

660432432 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660432432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970509312).

660432432 is an abundant number, since it is smaller than the sum of its proper divisors (1280586192).

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

660432432 is a wasteful number, since it uses less digits than its factorization.

660432432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 660432432 is about 25698.8799755943. The cubic root of 660432432 is about 870.8488794785.

Adding to 660432432 its reverse (234234066), we get a palindrome (894666498).

The spelling of 660432432 in words is "six hundred sixty million, four hundred thirty-two thousand, four hundred thirty-two".