660143448 has 96 divisors (see below), whose sum is σ = 1914120000. Its totient is φ = 204907968.

The previous prime is 660143441. The next prime is 660143459. The reversal of 660143448 is 844341066.

660143448 is a `hidden beast` number, since 6 + 601 + 4 + 3 + 4 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660143441) 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 23 ways as a sum of consecutive naturals, for example, 76623 + ... + 84801.

It is an arithmetic number, because the mean of its divisors is an integer number (19938750).

Almost surely, 2^660143448 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 660143448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957060000).

660143448 is an abundant number, since it is smaller than the sum of its proper divisors (1253976552).

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

660143448 is a wasteful number, since it uses less digits than its factorization.

660143448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8269 (or 8262 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 660143448 is about 25693.2568585612. The cubic root of 660143448 is about 870.7218424567.

It can be divided in two parts, 660 and 143448, that multiplied together give a triangular number (94675680 = T₁₃₇₆₀).

The spelling of 660143448 in words is "six hundred sixty million, one hundred forty-three thousand, four hundred forty-eight".