166240243 has 8 divisors (see below), whose sum is σ = 180801936. Its totient is φ = 151932000.

The previous prime is 166240231. The next prime is 166240301. The reversal of 166240243 is 342042661.

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

It is a cyclic number.

It is not a de Polignac number, because 166240243 - 2⁵ = 166240211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166240213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61993 + ... + 64618.

It is an arithmetic number, because the mean of its divisors is an integer number (22600242).

Almost surely, 2^166240243 is an apocalyptic number.

166240243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166240243 is a deficient number, since it is larger than the sum of its proper divisors (14561693).

166240243 is a wasteful number, since it uses less digits than its factorization.

166240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126725.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 166240243 is about 12893.4185924448. The cubic root of 166240243 is about 549.8514673290.

It can be divided in two parts, 1662 and 40243, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 166240243 in words is "one hundred sixty-six million, two hundred forty thousand, two hundred forty-three".