66515028 has 24 divisors (see below), whose sum is σ = 155514240. Its totient is φ = 22127040.

The previous prime is 66515027. The next prime is 66515039. The reversal of 66515028 is 82051566.

It is a self number, because there is not a number n which added to its sum of digits gives 66515028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66515021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (6479760).

Almost surely, 2^66515028 is an apocalyptic number.

It is an amenable number.

66515028 is an abundant number, since it is smaller than the sum of its proper divisors (88999212).

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

66515028 is a wasteful number, since it uses less digits than its factorization.

66515028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11167 (or 11165 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 66515028 is about 8155.6745888982. The cubic root of 66515028 is about 405.1724673164.

The spelling of 66515028 in words is "sixty-six million, five hundred fifteen thousand, twenty-eight".