166126985 has 8 divisors (see below), whose sum is σ = 205783296. Its totient is φ = 128614320.

The previous prime is 166126981. The next prime is 166126997. The reversal of 166126985 is 589621661.

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

It is not a de Polignac number, because 166126985 - 2² = 166126981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166126981) 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, 535739 + ... + 536048.

It is an arithmetic number, because the mean of its divisors is an integer number (25722912).

Almost surely, 2^166126985 is an apocalyptic number.

It is an amenable number.

166126985 is a deficient number, since it is larger than the sum of its proper divisors (39656311).

166126985 is a wasteful number, since it uses less digits than its factorization.

166126985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071823.

The product of its digits is 155520, while the sum is 44.

The square root of 166126985 is about 12889.0257583729. The cubic root of 166126985 is about 549.7265693215.

The spelling of 166126985 in words is "one hundred sixty-six million, one hundred twenty-six thousand, nine hundred eighty-five".