166287540 has 48 divisors (see below), whose sum is σ = 492996672. Its totient is φ = 41734656.

The previous prime is 166287533. The next prime is 166287571. The reversal of 166287540 is 45782661.

166287540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80494 + ... + 82533.

It is an arithmetic number, because the mean of its divisors is an integer number (10270764).

Almost surely, 2^166287540 is an apocalyptic number.

166287540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166287540 is an abundant number, since it is smaller than the sum of its proper divisors (326709132).

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

166287540 is a wasteful number, since it uses less digits than its factorization.

166287540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163056 (or 163054 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 166287540 is about 12895.2526148191. The cubic root of 166287540 is about 549.9036084520.

The spelling of 166287540 in words is "one hundred sixty-six million, two hundred eighty-seven thousand, five hundred forty".