66606976 has 32 divisors (see below), whose sum is σ = 133140600. Its totient is φ = 33191424.

The previous prime is 66606961. The next prime is 66606979. The reversal of 66606976 is 67960666.

It is a happy number.

66606976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66606979) 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 3 ways as a sum of consecutive naturals, for example, 47826 + ... + 49198.

Almost surely, 2^66606976 is an apocalyptic number.

It is an amenable number.

66606976 is a deficient number, since it is larger than the sum of its proper divisors (66533624).

66606976 is a wasteful number, since it uses less digits than its factorization.

66606976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 66606976 is about 8161.3096988167. The cubic root of 66606976 is about 405.3590800050.

The spelling of 66606976 in words is "sixty-six million, six hundred six thousand, nine hundred seventy-six".