166140206 has 8 divisors (see below), whose sum is σ = 254512800. Its totient is φ = 81302608.

The previous prime is 166140197. The next prime is 166140209. The reversal of 166140206 is 602041661.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166140209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883631 + ... + 883818.

It is an arithmetic number, because the mean of its divisors is an integer number (31814100).

Almost surely, 2^166140206 is an apocalyptic number.

166140206 is a deficient number, since it is larger than the sum of its proper divisors (88372594).

166140206 is a wasteful number, since it uses less digits than its factorization.

166140206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767498.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 166140206 is about 12889.5386263435. The cubic root of 166140206 is about 549.7411520260.

Adding to 166140206 its reverse (602041661), we get a palindrome (768181867).

The spelling of 166140206 in words is "one hundred sixty-six million, one hundred forty thousand, two hundred six".