660541600 has 72 divisors (see below), whose sum is σ = 1682704800. Its totient is φ = 252721920.

The previous prime is 660541561. The next prime is 660541621. The reversal of 660541600 is 6145066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 451 + ... + 36349.

It is an arithmetic number, because the mean of its divisors is an integer number (23370900).

Almost surely, 2^660541600 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 660541600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841352400).

660541600 is an abundant number, since it is smaller than the sum of its proper divisors (1022163200).

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

660541600 is a wasteful number, since it uses less digits than its factorization.

660541600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35942 (or 35929 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 660541600 is about 25701.0038714444. The cubic root of 660541600 is about 870.8968599572.

Adding to 660541600 its reverse (6145066), we get a palindrome (666686666).

It can be divided in two parts, 6605 and 41600, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 660541600 in words is "six hundred sixty million, five hundred forty-one thousand, six hundred".