166487394 has 8 divisors (see below), whose sum is σ = 332974800. Its totient is φ = 55495796.

The previous prime is 166487381. The next prime is 166487411. The reversal of 166487394 is 493784661.

166487394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

166487394 is an admirable number.

It is a super-2 number, since 2×166487394² = 55436104721822472, which contains 22 as substring.

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, 13873944 + ... + 13873955.

It is an arithmetic number, because the mean of its divisors is an integer number (41621850).

Almost surely, 2^166487394 is an apocalyptic number.

166487394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166487394 is a wasteful number, since it uses less digits than its factorization.

166487394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27747904.

The product of its digits is 870912, while the sum is 48.

The square root of 166487394 is about 12902.9994187398. Note that the first 3 decimals coincide. The cubic root of 166487394 is about 550.1238222594.

It can be divided in two parts, 16648 and 7394, that added together give a palindrome (24042).

The spelling of 166487394 in words is "one hundred sixty-six million, four hundred eighty-seven thousand, three hundred ninety-four".