66185130 has 64 divisors (see below), whose sum is σ = 174721536. Its totient is φ = 15912000.

The previous prime is 66185101. The next prime is 66185143. The reversal of 66185130 is 3158166.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 42465 + ... + 43995.

It is an arithmetic number, because the mean of its divisors is an integer number (2730024).

Almost surely, 2^66185130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66185130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87360768).

66185130 is an abundant number, since it is smaller than the sum of its proper divisors (108536406).

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

66185130 is a wasteful number, since it uses less digits than its factorization.

66185130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 66185130 is about 8135.4243896677. The cubic root of 66185130 is about 404.5015052584.

The spelling of 66185130 in words is "sixty-six million, one hundred eighty-five thousand, one hundred thirty".