166335861 has 8 divisors (see below), whose sum is σ = 233453920. Its totient is φ = 105054192.

The previous prime is 166335857. The next prime is 166335913. The reversal of 166335861 is 168533661.

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

It is not a de Polignac number, because 166335861 - 2² = 166335857 is a prime.

It is a super-2 number, since 2×166335861² = 55335237309222642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166335061) 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, 1459030 + ... + 1459143.

It is an arithmetic number, because the mean of its divisors is an integer number (29181740).

Almost surely, 2^166335861 is an apocalyptic number.

It is an amenable number.

166335861 is a deficient number, since it is larger than the sum of its proper divisors (67118059).

166335861 is a wasteful number, since it uses less digits than its factorization.

166335861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918195.

The product of its digits is 77760, while the sum is 39.

The square root of 166335861 is about 12897.1260752154. The cubic root of 166335861 is about 549.9568682430.

The spelling of 166335861 in words is "one hundred sixty-six million, three hundred thirty-five thousand, eight hundred sixty-one".