66448656 has 60 divisors (see below), whose sum is σ = 194059008. Its totient is φ = 21185472.

The previous prime is 66448637. The next prime is 66448661. The reversal of 66448656 is 65684466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6720 + ... + 13343.

Almost surely, 2^66448656 is an apocalyptic number.

It is an amenable number.

66448656 is an abundant number, since it is smaller than the sum of its proper divisors (127610352).

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

66448656 is a wasteful number, since it uses less digits than its factorization.

66448656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100 (or 20091 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 66448656 is about 8151.6045046359. The cubic root of 66448656 is about 405.0376553923.

The spelling of 66448656 in words is "sixty-six million, four hundred forty-eight thousand, six hundred fifty-six".