666844119 has 6 divisors (see below), whose sum is σ = 963219296. Its totient is φ = 444562740.

The previous prime is 666844111. The next prime is 666844147. The reversal of 666844119 is 911448666.

It is not a de Polignac number, because 666844119 - 2³ = 666844111 is a prime.

It is a super-2 number, since 2×666844119² = 889362158089772322, 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 (666844111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37046887 + ... + 37046904.

Almost surely, 2^666844119 is an apocalyptic number.

666844119 is a deficient number, since it is larger than the sum of its proper divisors (296375177).

666844119 is a wasteful number, since it uses less digits than its factorization.

666844119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74093797 (or 74093794 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 666844119 is about 25823.3250957347. The cubic root of 666844119 is about 873.6579673061.

The spelling of 666844119 in words is "six hundred sixty-six million, eight hundred forty-four thousand, one hundred nineteen".