166419 has 18 divisors (see below), whose sum is σ = 268788. Its totient is φ = 98400.

The previous prime is 166417. The next prime is 166429. The reversal of 166419 is 914661.

166419 is a `hidden beast` number, since 16 + 641 + 9 = 666.

It is not a de Polignac number, because 166419 - 2¹ = 166417 is a prime.

It is a super-2 number, since 2×166419² = 55390567122, which contains 22 as substring.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 166392 and 166401.

It is not an unprimeable number, because it can be changed into a prime (166417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4039 + ... + 4079.

2¹⁶⁶⁴¹⁹ is an apocalyptic number.

166419 is a deficient number, since it is larger than the sum of its proper divisors (102369).

166419 is a wasteful number, since it uses less digits than its factorization.

166419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 55 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 166419 is about 407.9448492137. The cubic root of 166419 is about 55.0048480575.

It can be divided in two parts, 16641 and 9, that multiplied together give a square (149769 = 387²).

The spelling of 166419 in words is "one hundred sixty-six thousand, four hundred nineteen".