66298560 has 56 divisors (see below), whose sum is σ = 210500976. Its totient is φ = 17679360.

The previous prime is 66298549. The next prime is 66298567. The reversal of 66298560 is 6589266.

66298560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66298567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33571 + ... + 35490.

It is an arithmetic number, because the mean of its divisors is an integer number (3758946).

Almost surely, 2^66298560 is an apocalyptic number.

66298560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66298560 is an abundant number, since it is smaller than the sum of its proper divisors (144202416).

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

66298560 is a wasteful number, since it uses less digits than its factorization.

66298560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69081 (or 69071 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 66298560 is about 8142.3927687136. The cubic root of 66298560 is about 404.7324555188.

The spelling of 66298560 in words is "sixty-six million, two hundred ninety-eight thousand, five hundred sixty".