988166666 has 16 divisors (see below), whose sum is σ = 1523293128. Its totient is φ = 480480000.

The previous prime is 988166657. The next prime is 988166671. The reversal of 988166666 is 666661889.

988166666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 394221025 + 593945641 = 19855^2 + 24371^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6416 + ... + 44916.

Almost surely, 2^988166666 is an apocalyptic number.

988166666 is a deficient number, since it is larger than the sum of its proper divisors (535126462).

988166666 is a wasteful number, since it uses less digits than its factorization.

988166666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38857.

The product of its digits is 4478976, while the sum is 56.

The square root of 988166666 is about 31435.1183551136. The cubic root of 988166666 is about 996.0398935920.

The spelling of 988166666 in words is "nine hundred eighty-eight million, one hundred sixty-six thousand, six hundred sixty-six".