678903450166 has 16 divisors (see below), whose sum is σ = 1026495737856. Its totient is φ = 336738839976.

The previous prime is 678903450143. The next prime is 678903450221. The reversal of 678903450166 is 661054309876.

It is a congruent number.

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, 2041785 + ... + 2350891.

It is an arithmetic number, because the mean of its divisors is an integer number (64155983616).

Almost surely, 2^678903450166 is an apocalyptic number.

678903450166 is a deficient number, since it is larger than the sum of its proper divisors (347592287690).

678903450166 is a wasteful number, since it uses less digits than its factorization.

678903450166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317883.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 678903450166 in words is "six hundred seventy-eight billion, nine hundred three million, four hundred fifty thousand, one hundred sixty-six".