66205028 has 12 divisors (see below), whose sum is σ = 119854140. Its totient is φ = 31960992.

The previous prime is 66205019. The next prime is 66205031. The reversal of 66205028 is 82050266.

It can be written as a sum of positive squares in 2 ways, for example, as 38663524 + 27541504 = 6218^2 + 5248^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285251 + ... + 285482.

It is an arithmetic number, because the mean of its divisors is an integer number (9987845).

Almost surely, 2^66205028 is an apocalyptic number.

It is an amenable number.

66205028 is a deficient number, since it is larger than the sum of its proper divisors (53649112).

66205028 is a wasteful number, since it uses less digits than its factorization.

66205028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570766 (or 570764 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 66205028 is about 8136.6472210610. The cubic root of 66205028 is about 404.5420378497.

The spelling of 66205028 in words is "sixty-six million, two hundred five thousand, twenty-eight".