66648996 has 36 divisors (see below), whose sum is σ = 171334800. Its totient is φ = 21839088.

The previous prime is 66648983. The next prime is 66649043. The reversal of 66648996 is 69984666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 13566 + ... + 17813.

It is an arithmetic number, because the mean of its divisors is an integer number (4759300).

Almost surely, 2^66648996 is an apocalyptic number.

It is an amenable number.

66648996 is an abundant number, since it is smaller than the sum of its proper divisors (104685804).

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

66648996 is a wasteful number, since it uses less digits than its factorization.

66648996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31448 (or 31443 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 66648996 is about 8163.8836346435. The cubic root of 66648996 is about 405.4443043511. Note that the first 3 decimals are identical.

The spelling of 66648996 in words is "sixty-six million, six hundred forty-eight thousand, nine hundred ninety-six".