660232140 has 96 divisors (see below), whose sum is σ = 1961245440. Its totient is φ = 165484800.

The previous prime is 660232117. The next prime is 660232147. The reversal of 660232140 is 41232066.

It is a self number, because there is not a number n which added to its sum of digits gives 660232140.

It is not an unprimeable number, because it can be changed into a prime (660232147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147130 + ... + 151550.

It is an arithmetic number, because the mean of its divisors is an integer number (20429640).

Almost surely, 2^660232140 is an apocalyptic number.

660232140 is a gapful number since it is divisible by the number (60) 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 660232140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980622720).

660232140 is an abundant number, since it is smaller than the sum of its proper divisors (1301013300).

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

660232140 is a wasteful number, since it uses less digits than its factorization.

660232140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583 (or 4581 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 660232140 is about 25694.9827787450. The cubic root of 660232140 is about 870.7608352966.

The spelling of 660232140 in words is "six hundred sixty million, two hundred thirty-two thousand, one hundred forty".