66736868 has 24 divisors (see below), whose sum is σ = 127842624. Its totient is φ = 30231200.

The previous prime is 66736829. The next prime is 66736907. The reversal of 66736868 is 86863766.

It is an interprime number because it is at equal distance from previous prime (66736829) and next prime (66736907).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11246 + ... + 16122.

It is an arithmetic number, because the mean of its divisors is an integer number (5326776).

Almost surely, 2^66736868 is an apocalyptic number.

It is an amenable number.

66736868 is a deficient number, since it is larger than the sum of its proper divisors (61105756).

66736868 is a wasteful number, since it uses less digits than its factorization.

66736868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5203 (or 5201 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 66736868 is about 8169.2636143045. The cubic root of 66736868 is about 405.6224093399.

The spelling of 66736868 in words is "sixty-six million, seven hundred thirty-six thousand, eight hundred sixty-eight".