660028152240 has 160 divisors (see below), whose sum is σ = 2274025881600. Its totient is φ = 175961399040.

The previous prime is 660028152211. The next prime is 660028152263. The reversal of 660028152240 is 42251820066.

It is a happy number.

660028152240 is a `hidden beast` number, since 6 + 600 + 2 + 8 + 1 + 5 + 2 + 2 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 660028152195 and 660028152204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8643025 + ... + 8719055.

It is an arithmetic number, because the mean of its divisors is an integer number (14212661760).

Almost surely, 2^660028152240 is an apocalyptic number.

660028152240 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 660028152240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1137012940800).

660028152240 is an abundant number, since it is smaller than the sum of its proper divisors (1613997729360).

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

660028152240 is a wasteful number, since it uses less digits than its factorization.

660028152240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80072 (or 80060 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 660028152240 in words is "six hundred sixty billion, twenty-eight million, one hundred fifty-two thousand, two hundred forty".