166516656 has 20 divisors (see below), whose sum is σ = 430168152. Its totient is φ = 55505536.

The previous prime is 166516643. The next prime is 166516657. The reversal of 166516656 is 656615661.

It is not an unprimeable number, because it can be changed into a prime (166516657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734501 + ... + 1734596.

Almost surely, 2^166516656 is an apocalyptic number.

166516656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166516656 is an abundant number, since it is smaller than the sum of its proper divisors (263651496).

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

166516656 is a wasteful number, since it uses less digits than its factorization.

166516656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469108 (or 3469102 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 166516656 is about 12904.1332913141. The cubic root of 166516656 is about 550.1560504857.

The spelling of 166516656 in words is "one hundred sixty-six million, five hundred sixteen thousand, six hundred fifty-six".