66100280 has 32 divisors (see below), whose sum is σ = 153856800. Its totient is φ = 25527936.

The previous prime is 66100273. The next prime is 66100289. The reversal of 66100280 is 8200166.

66100280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66100289) 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, 27332 + ... + 29651.

It is an arithmetic number, because the mean of its divisors is an integer number (4808025).

Almost surely, 2^66100280 is an apocalyptic number.

It is an amenable number.

66100280 is an abundant number, since it is smaller than the sum of its proper divisors (87756520).

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

66100280 is a wasteful number, since it uses less digits than its factorization.

66100280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57023 (or 57019 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 66100280 is about 8130.2078694213. The cubic root of 66100280 is about 404.3285730091.

The spelling of 66100280 in words is "sixty-six million, one hundred thousand, two hundred eighty".