66286860 has 24 divisors (see below), whose sum is σ = 185603376. Its totient is φ = 17676480.

The previous prime is 66286823. The next prime is 66286861. The reversal of 66286860 is 6868266.

It is not an unprimeable number, because it can be changed into a prime (66286861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552331 + ... + 552450.

It is an arithmetic number, because the mean of its divisors is an integer number (7733474).

Almost surely, 2^66286860 is an apocalyptic number.

66286860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66286860 is an abundant number, since it is smaller than the sum of its proper divisors (119316516).

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

66286860 is a wasteful number, since it uses less digits than its factorization.

66286860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104793 (or 1104791 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 66286860 is about 8141.6742749879. The cubic root of 66286860 is about 404.7086458095.

The spelling of 66286860 in words is "sixty-six million, two hundred eighty-six thousand, eight hundred sixty".