66942068 has 12 divisors (see below), whose sum is σ = 117567492. Its totient is φ = 33351360.

The previous prime is 66942059. The next prime is 66942077. The reversal of 66942068 is 86024966.

It is an interprime number because it is at equal distance from previous prime (66942059) and next prime (66942077).

It can be written as a sum of positive squares in 2 ways, for example, as 29463184 + 37478884 = 5428^2 + 6122^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 28655 + ... + 30902.

It is an arithmetic number, because the mean of its divisors is an integer number (9797291).

Almost surely, 2^66942068 is an apocalyptic number.

It is an amenable number.

66942068 is a deficient number, since it is larger than the sum of its proper divisors (50625424).

66942068 is a wasteful number, since it uses less digits than its factorization.

66942068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59842 (or 59840 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 66942068 is about 8181.8132464632. The cubic root of 66942068 is about 406.0377147942.

The spelling of 66942068 in words is "sixty-six million, nine hundred forty-two thousand, sixty-eight".