66730750 has 32 divisors (see below), whose sum is σ = 125483904. Its totient is φ = 26572000.

The previous prime is 66730709. The next prime is 66730757. The reversal of 66730750 is 5703766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66730757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72795 + ... + 73705.

It is an arithmetic number, because the mean of its divisors is an integer number (3921372).

Almost surely, 2^66730750 is an apocalyptic number.

66730750 is a deficient number, since it is larger than the sum of its proper divisors (58753154).

66730750 is a wasteful number, since it uses less digits than its factorization.

66730750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 66730750 is about 8168.8891533672. The cubic root of 66730750 is about 405.6100140237.

The spelling of 66730750 in words is "sixty-six million, seven hundred thirty thousand, seven hundred fifty".