66675730 has 32 divisors (see below), whose sum is σ = 135157248. Its totient is φ = 23462400.

The previous prime is 66675709. The next prime is 66675733. The reversal of 66675730 is 3757666.

66675730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66675733) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6367 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (4223664).

Almost surely, 2^66675730 is an apocalyptic number.

66675730 is an abundant number, since it is smaller than the sum of its proper divisors (68481518).

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

66675730 is a wasteful number, since it uses less digits than its factorization.

66675730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19602.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 66675730 is about 8165.5208039659. The cubic root of 66675730 is about 405.4985072136.

The spelling of 66675730 in words is "sixty-six million, six hundred seventy-five thousand, seven hundred thirty".