66028896 has 36 divisors (see below), whose sum is σ = 187770492. Its totient is φ = 22009536.

The previous prime is 66028877. The next prime is 66028909. The reversal of 66028896 is 69882066.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114346 + ... + 114921.

It is an arithmetic number, because the mean of its divisors is an integer number (5215847).

Almost surely, 2^66028896 is an apocalyptic number.

It is an amenable number.

66028896 is an abundant number, since it is smaller than the sum of its proper divisors (121741596).

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

66028896 is a wasteful number, since it uses less digits than its factorization.

66028896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229283 (or 229272 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 66028896 is about 8125.8166358834. The cubic root of 66028896 is about 404.1829710691.

The spelling of 66028896 in words is "sixty-six million, twenty-eight thousand, eight hundred ninety-six".