660011505000 has 160 divisors (see below), whose sum is σ = 2062725466560. Its totient is φ = 175930560000.

The previous prime is 660011504983. The next prime is 660011505007. The reversal of 660011505000 is 505110066.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (660011505007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43297380 + ... + 43312620.

It is an arithmetic number, because the mean of its divisors is an integer number (12892034166).

Almost surely, 2^660011505000 is an apocalyptic number.

660011505000 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 660011505000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031362733280).

660011505000 is an abundant number, since it is smaller than the sum of its proper divisors (1402713961560).

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

660011505000 is a wasteful number, since it uses less digits than its factorization.

660011505000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18157 (or 18138 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 660011505000 its reverse (505110066), we get a palindrome (660516615066).

The spelling of 660011505000 in words is "six hundred sixty billion, eleven million, five hundred five thousand".