166672019 has 8 divisors (see below), whose sum is σ = 172584000. Its totient is φ = 160771072.

The previous prime is 166671997. The next prime is 166672021. The reversal of 166672019 is 910276661.

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 166672019 - 2¹⁶ = 166606483 is a prime.

It is a super-2 number, since 2×166672019² = 55559123835072722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166672039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38822 + ... + 42900.

It is an arithmetic number, because the mean of its divisors is an integer number (21573000).

Almost surely, 2^166672019 is an apocalyptic number.

166672019 is a deficient number, since it is larger than the sum of its proper divisors (5911981).

166672019 is a wasteful number, since it uses less digits than its factorization.

166672019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 166672019 is about 12910.1517806724. The cubic root of 166672019 is about 550.3270990911.

The spelling of 166672019 in words is "one hundred sixty-six million, six hundred seventy-two thousand, nineteen".