66963916 has 6 divisors (see below), whose sum is σ = 117186860. Its totient is φ = 33481956.

The previous prime is 66963907. The next prime is 66963931. The reversal of 66963916 is 61936966.

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 as a sum of consecutive naturals, namely, 8370486 + ... + 8370493.

Almost surely, 2^66963916 is an apocalyptic number.

It is an amenable number.

66963916 is a deficient number, since it is larger than the sum of its proper divisors (50222944).

66963916 is a wasteful number, since it uses less digits than its factorization.

66963916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16740983 (or 16740981 counting only the distinct ones).

The product of its digits is 314928, while the sum is 46.

The square root of 66963916 is about 8183.1482939025. The cubic root of 66963916 is about 406.0818830696.

The spelling of 66963916 in words is "sixty-six million, nine hundred sixty-three thousand, nine hundred sixteen".