660527040 has 112 divisors (see below), whose sum is σ = 2106887328. Its totient is φ = 175325184.

The previous prime is 660527011. The next prime is 660527047. The reversal of 660527040 is 40725066.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 660526989 and 660527007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660527047) 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 15 ways as a sum of consecutive naturals, for example, 222204 + ... + 225156.

It is an arithmetic number, because the mean of its divisors is an integer number (18811494).

Almost surely, 2^660527040 is an apocalyptic number.

660527040 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 660527040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053443664).

660527040 is an abundant number, since it is smaller than the sum of its proper divisors (1446360288).

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

660527040 is a wasteful number, since it uses less digits than its factorization.

660527040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206 (or 3196 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 660527040 is about 25700.7206124653. The cubic root of 660527040 is about 870.8904609903.

The spelling of 660527040 in words is "six hundred sixty million, five hundred twenty-seven thousand, forty".