166340242 has 8 divisors (see below), whose sum is σ = 249900336. Its totient is φ = 83040132.

The previous prime is 166340227. The next prime is 166340261. The reversal of 166340242 is 242043661.

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

It is a super-2 number, since 2×166340242² = 55338152217237128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166340242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63388 + ... + 65959.

It is an arithmetic number, because the mean of its divisors is an integer number (31237542).

Almost surely, 2^166340242 is an apocalyptic number.

166340242 is a deficient number, since it is larger than the sum of its proper divisors (83560094).

166340242 is a wasteful number, since it uses less digits than its factorization.

166340242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129992.

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

The square root of 166340242 is about 12897.2959181373. The cubic root of 166340242 is about 549.9616965061.

It can be divided in two parts, 1663 and 40242, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 166340242 in words is "one hundred sixty-six million, three hundred forty thousand, two hundred forty-two".