66105930 has 48 divisors (see below), whose sum is σ = 174398112. Its totient is φ = 16024800.

The previous prime is 66105917. The next prime is 66105947. The reversal of 66105930 is 3950166.

It is a happy number.

66105930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5476 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (3633294).

Almost surely, 2^66105930 is an apocalyptic number.

66105930 is an abundant number, since it is smaller than the sum of its proper divisors (108292182).

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

66105930 is a wasteful number, since it uses less digits than its factorization.

66105930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18243 (or 18232 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 66105930 is about 8130.5553315871. Note that the first 3 decimals coincide. The cubic root of 66105930 is about 404.3400928360.

The spelling of 66105930 in words is "sixty-six million, one hundred five thousand, nine hundred thirty".