66285450 has 144 divisors (see below), whose sum is σ = 222146496. Its totient is φ = 13766400.

The previous prime is 66285449. The next prime is 66285487. The reversal of 66285450 is 5458266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 33694 + ... + 35606.

It is an arithmetic number, because the mean of its divisors is an integer number (1542684).

Almost surely, 2^66285450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66285450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111073248).

66285450 is an abundant number, since it is smaller than the sum of its proper divisors (155861046).

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

66285450 is a wasteful number, since it uses less digits than its factorization.

66285450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 66285450 is about 8141.5876830014. The cubic root of 66285450 is about 404.7057762451.

The spelling of 66285450 in words is "sixty-six million, two hundred eighty-five thousand, four hundred fifty".