66201028 has 12 divisors (see below), whose sum is σ = 118038060. Its totient is φ = 32475872.

The previous prime is 66201017. The next prime is 66201053. The reversal of 66201028 is 82010266.

66201028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23794884 + 42406144 = 4878^2 + 6512^2 .

It is a super-2 number, since 2×66201028² = 8765152216513568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66200993 and 66201011.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 155923 + ... + 156346.

It is an arithmetic number, because the mean of its divisors is an integer number (9836505).

Almost surely, 2^66201028 is an apocalyptic number.

It is an amenable number.

66201028 is a deficient number, since it is larger than the sum of its proper divisors (51837032).

66201028 is a wasteful number, since it uses less digits than its factorization.

66201028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312326 (or 312324 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 66201028 is about 8136.4014158595. The cubic root of 66201028 is about 404.5338904286.

The spelling of 66201028 in words is "sixty-six million, two hundred one thousand, twenty-eight".