166560656 has 10 divisors (see below), whose sum is σ = 322711302. Its totient is φ = 83280320.

The previous prime is 166560637. The next prime is 166560661. The reversal of 166560656 is 656065661.

It can be written as a sum of positive squares in only one way, i.e., 114490000 + 52070656 = 10700^2 + 7216^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5205005 + ... + 5205036.

Almost surely, 2^166560656 is an apocalyptic number.

166560656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166560656 is a deficient number, since it is larger than the sum of its proper divisors (156150646).

166560656 is a wasteful number, since it uses less digits than its factorization.

166560656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410049 (or 10410043 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 166560656 is about 12905.8380588011. The cubic root of 166560656 is about 550.2045035654.

The spelling of 166560656 in words is "one hundred sixty-six million, five hundred sixty thousand, six hundred fifty-six".