166701946 has 8 divisors (see below), whose sum is σ = 256811220. Its totient is φ = 81098208.

The previous prime is 166701943. The next prime is 166701961. The reversal of 166701946 is 649107661.

It can be written as a sum of positive squares in 2 ways, for example, as 146676321 + 20025625 = 12111^2 + 4475^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 166701899 and 166701908.

It is not an unprimeable number, because it can be changed into a prime (166701943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1126291 + ... + 1126438.

Almost surely, 2^166701946 is an apocalyptic number.

166701946 is a deficient number, since it is larger than the sum of its proper divisors (90109274).

166701946 is a wasteful number, since it uses less digits than its factorization.

166701946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252768.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 166701946 is about 12911.3107777638. The cubic root of 166701946 is about 550.3600353403.

The spelling of 166701946 in words is "one hundred sixty-six million, seven hundred one thousand, nine hundred forty-six".