66606722 has 32 divisors (see below), whose sum is σ = 123379200. Its totient is φ = 26261568.

The previous prime is 66606721. The next prime is 66606737. The reversal of 66606722 is 22760666.

66606722 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 (66606721) 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, 92279 + ... + 92997.

It is an arithmetic number, because the mean of its divisors is an integer number (3855600).

Almost surely, 2^66606722 is an apocalyptic number.

66606722 is a deficient number, since it is larger than the sum of its proper divisors (56772478).

66606722 is a wasteful number, since it uses less digits than its factorization.

66606722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 66606722 is about 8161.2941375740. The cubic root of 66606722 is about 405.3585647370.

The spelling of 66606722 in words is "sixty-six million, six hundred six thousand, seven hundred twenty-two".