66606056 has 16 divisors (see below), whose sum is σ = 136239840. Its totient is φ = 30275440.

The previous prime is 66606053. The next prime is 66606061. The reversal of 66606056 is 65060666.

It is not an unprimeable number, because it can be changed into a prime (66606053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378356 + ... + 378531.

It is an arithmetic number, because the mean of its divisors is an integer number (8514990).

Almost surely, 2^66606056 is an apocalyptic number.

It is an amenable number.

66606056 is an abundant number, since it is smaller than the sum of its proper divisors (69633784).

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

66606056 is a wasteful number, since it uses less digits than its factorization.

66606056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756904 (or 756900 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66606056 is about 8161.2533351196. The cubic root of 66606056 is about 405.3572136737.

The spelling of 66606056 in words is "sixty-six million, six hundred six thousand, fifty-six".