66284780 has 12 divisors (see below), whose sum is σ = 139198080. Its totient is φ = 26513904.

The previous prime is 66284773. The next prime is 66284839. The reversal of 66284780 is 8748266.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1657100 + ... + 1657139.

It is an arithmetic number, because the mean of its divisors is an integer number (11599840).

Almost surely, 2^66284780 is an apocalyptic number.

It is an amenable number.

66284780 is an abundant number, since it is smaller than the sum of its proper divisors (72913300).

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

66284780 is a wasteful number, since it uses less digits than its factorization.

66284780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314248 (or 3314246 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 66284780 is about 8141.5465361318. The cubic root of 66284780 is about 404.7044126790.

The spelling of 66284780 in words is "sixty-six million, two hundred eighty-four thousand, seven hundred eighty".