66678898175 has 12 divisors (see below), whose sum is σ = 82695967536. Its totient is φ = 53334000000.

The previous prime is 66678898163. The next prime is 66678898183. The reversal of 66678898175 is 57189887666.

It is not a de Polignac number, because 66678898175 - 2¹⁰ = 66678897151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66678898099 and 66678898108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76826 + ... + 373175.

It is an arithmetic number, because the mean of its divisors is an integer number (6891330628).

Almost surely, 2^66678898175 is an apocalyptic number.

66678898175 is a deficient number, since it is larger than the sum of its proper divisors (16017069361).

66678898175 is a wasteful number, since it uses less digits than its factorization.

66678898175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455938 (or 455933 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 71.

The spelling of 66678898175 in words is "sixty-six billion, six hundred seventy-eight million, eight hundred ninety-eight thousand, one hundred seventy-five".