66942678904 has 16 divisors (see below), whose sum is σ = 128909889000. Its totient is φ = 32566708512.

The previous prime is 66942678893. The next prime is 66942678977. The reversal of 66942678904 is 40987624966.

It is a super-4 number, since 4×66942678904⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113078554 + ... + 113079145.

Almost surely, 2^66942678904 is an apocalyptic number.

It is an amenable number.

66942678904 is a deficient number, since it is larger than the sum of its proper divisors (61967210096).

66942678904 is a wasteful number, since it uses less digits than its factorization.

66942678904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226157742 (or 226157738 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 66942678904 in words is "sixty-six billion, nine hundred forty-two million, six hundred seventy-eight thousand, nine hundred four".