66630968 has 8 divisors (see below), whose sum is σ = 124933080. Its totient is φ = 33315480.

The previous prime is 66630961. The next prime is 66630979. The reversal of 66630968 is 86903666.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66630961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4164428 + ... + 4164443.

It is an arithmetic number, because the mean of its divisors is an integer number (15616635).

Almost surely, 2^66630968 is an apocalyptic number.

It is an amenable number.

66630968 is a deficient number, since it is larger than the sum of its proper divisors (58302112).

66630968 is a wasteful number, since it uses less digits than its factorization.

66630968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8328877 (or 8328873 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 66630968 is about 8162.7794286015. The cubic root of 66630968 is about 405.4077446153.

The spelling of 66630968 in words is "sixty-six million, six hundred thirty thousand, nine hundred sixty-eight".