166387544 has 8 divisors (see below), whose sum is σ = 311976660. Its totient is φ = 83193768.

The previous prime is 166387537. The next prime is 166387561. The reversal of 166387544 is 445783661.

166387544 is digitally balanced in base 3, because in such base 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 (8).

It is a junction number, because it is equal to n+sod(n) for n = 166387495 and 166387504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399214 + ... + 10399229.

Almost surely, 2^166387544 is an apocalyptic number.

It is an amenable number.

166387544 is a deficient number, since it is larger than the sum of its proper divisors (145589116).

166387544 is a wasteful number, since it uses less digits than its factorization.

166387544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20798449 (or 20798445 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 166387544 is about 12899.1295830378. The cubic root of 166387544 is about 550.0138222422.

The spelling of 166387544 in words is "one hundred sixty-six million, three hundred eighty-seven thousand, five hundred forty-four".