166478656 has 28 divisors (see below), whose sum is σ = 332110080. Its totient is φ = 82797440.

The previous prime is 166478639. The next prime is 166478657. The reversal of 166478656 is 656874661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166478657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5415 + ... + 19033.

Almost surely, 2^166478656 is an apocalyptic number.

166478656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166478656 is a deficient number, since it is larger than the sum of its proper divisors (165631424).

166478656 is a wasteful number, since it uses less digits than its factorization.

166478656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822 (or 13812 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 166478656 is about 12902.6608108560. The cubic root of 166478656 is about 550.1141977748.

The spelling of 166478656 in words is "one hundred sixty-six million, four hundred seventy-eight thousand, six hundred fifty-six".