166655605560 has 64 divisors (see below), whose sum is σ = 500015630880. Its totient is φ = 44437155840.

The previous prime is 166655605531. The next prime is 166655605561. The reversal of 166655605560 is 65506556661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166655605561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1277104 + ... + 1401536.

Almost surely, 2^166655605560 is an apocalyptic number.

166655605560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166655605560 is an abundant number, since it is smaller than the sum of its proper divisors (333360025320).

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

166655605560 is a wasteful number, since it uses less digits than its factorization.

166655605560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135608 (or 135604 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 166655605560 in words is "one hundred sixty-six billion, six hundred fifty-five million, six hundred five thousand, five hundred sixty".