170666478 has 12 divisors (see below), whose sum is σ = 369777408. Its totient is φ = 56888820.

The previous prime is 170666443. The next prime is 170666497. The reversal of 170666478 is 874666071.

170666478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4740718 + ... + 4740753.

It is an arithmetic number, because the mean of its divisors is an integer number (30814784).

Almost surely, 2^170666478 is an apocalyptic number.

170666478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

170666478 is an abundant number, since it is smaller than the sum of its proper divisors (199110930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

170666478 is a wasteful number, since it uses less digits than its factorization.

170666478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481479 (or 9481476 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 170666478 is about 13063.9380739500. The cubic root of 170666478 is about 554.6888150833.

The spelling of 170666478 in words is "one hundred seventy million, six hundred sixty-six thousand, four hundred seventy-eight".