66678573350 has 96 divisors (see below), whose sum is σ = 131496583680. Its totient is φ = 25113836160.

The previous prime is 66678573331. The next prime is 66678573389. The reversal of 66678573350 is 5337587666.

It is a happy number.

It is a Curzon number.

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 47 ways as a sum of consecutive naturals, for example, 20920457 + ... + 20923643.

It is an arithmetic number, because the mean of its divisors is an integer number (1369756080).

Almost surely, 2^66678573350 is an apocalyptic number.

66678573350 is a deficient number, since it is larger than the sum of its proper divisors (64818010330).

66678573350 is a wasteful number, since it uses less digits than its factorization.

66678573350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582 (or 3577 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 56.

The spelling of 66678573350 in words is "sixty-six billion, six hundred seventy-eight million, five hundred seventy-three thousand, three hundred fifty".