166666648 has 32 divisors (see below), whose sum is σ = 334913760. Its totient is φ = 77552640.

The previous prime is 166666639. The next prime is 166666649. The reversal of 166666648 is 846666661.

166666648 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 not an unprimeable number, because it can be changed into a prime (166666649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5433 + ... + 19048.

It is an arithmetic number, because the mean of its divisors is an integer number (10466055).

Almost surely, 2^166666648 is an apocalyptic number.

It is an amenable number.

166666648 is an abundant number, since it is smaller than the sum of its proper divisors (168247112).

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

166666648 is a wasteful number, since it uses less digits than its factorization.

166666648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24547 (or 24543 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The square root of 166666648 is about 12909.9437644011. The cubic root of 166666648 is about 550.3211876038.

The spelling of 166666648 in words is "one hundred sixty-six million, six hundred sixty-six thousand, six hundred forty-eight".