66730730 has 16 divisors (see below), whose sum is σ = 131035104. Its totient is φ = 24265680.

The previous prime is 66730709. The next prime is 66730757. The reversal of 66730730 is 3703766.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 303212 + ... + 303431.

It is an arithmetic number, because the mean of its divisors is an integer number (8189694).

Almost surely, 2^66730730 is an apocalyptic number.

66730730 is a deficient number, since it is larger than the sum of its proper divisors (64304374).

66730730 is a wasteful number, since it uses less digits than its factorization.

66730730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606661.

The product of its (nonzero) digits is 15876, while the sum is 32.

The square root of 66730730 is about 8168.8879292104. The cubic root of 66730730 is about 405.6099735017.

The spelling of 66730730 in words is "sixty-six million, seven hundred thirty thousand, seven hundred thirty".