166436281 has 8 divisors (see below), whose sum is σ = 182225664. Its totient is φ = 150756720.

The previous prime is 166436279. The next prime is 166436293. The reversal of 166436281 is 182634661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 166436281 - 2¹ = 166436279 is a prime.

It is a super-2 number, since 2×166436281² = 55402071266221922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166436281.

It is not an unprimeable number, because it can be changed into a prime (166436251) 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, 24265 + ... + 30358.

It is an arithmetic number, because the mean of its divisors is an integer number (22778208).

Almost surely, 2^166436281 is an apocalyptic number.

166436281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166436281 is a deficient number, since it is larger than the sum of its proper divisors (15789383).

166436281 is a wasteful number, since it uses less digits than its factorization.

166436281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54911.

The product of its digits is 41472, while the sum is 37.

The square root of 166436281 is about 12901.0186031956. The cubic root of 166436281 is about 550.0675189836.

The spelling of 166436281 in words is "one hundred sixty-six million, four hundred thirty-six thousand, two hundred eighty-one".