166742988 has 12 divisors (see below), whose sum is σ = 389067000. Its totient is φ = 55580992.

The previous prime is 166742971. The next prime is 166743007. The reversal of 166742988 is 889247661.

166742988 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 166742988.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6947613 + ... + 6947636.

It is an arithmetic number, because the mean of its divisors is an integer number (32422250).

Almost surely, 2^166742988 is an apocalyptic number.

It is an amenable number.

166742988 is an abundant number, since it is smaller than the sum of its proper divisors (222324012).

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

166742988 is a wasteful number, since it uses less digits than its factorization.

166742988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13895256 (or 13895254 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 166742988 is about 12912.9000615663. The cubic root of 166742988 is about 550.4051978267.

The spelling of 166742988 in words is "one hundred sixty-six million, seven hundred forty-two thousand, nine hundred eighty-eight".