66530250 has 48 divisors (see below), whose sum is σ = 179903880. Its totient is φ = 17740800.

The previous prime is 66530213. The next prime is 66530251. The reversal of 66530250 is 5203566.

66530250 is a `hidden beast` number, since 6 + 653 + 0 + 2 + 5 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20602521 + 45927729 = 4539^2 + 6777^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66530251) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 12535 + ... + 17034.

Almost surely, 2^66530250 is an apocalyptic number.

66530250 is an abundant number, since it is smaller than the sum of its proper divisors (113373630).

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

66530250 is a wasteful number, since it uses less digits than its factorization.

66530250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29592 (or 29579 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 66530250 is about 8156.6077507748. The cubic root of 66530250 is about 405.2033729381.

The spelling of 66530250 in words is "sixty-six million, five hundred thirty thousand, two hundred fifty".