666824873 has 8 divisors (see below), whose sum is σ = 783402816. Its totient is φ = 559573200.

The previous prime is 666824857. The next prime is 666824887. The reversal of 666824873 is 378428666.

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 666824873 - 2⁴ = 666824857 is a prime.

It is a super-2 number, since 2×666824873² = 889310822502932258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666824833) 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, 2331413 + ... + 2331698.

It is an arithmetic number, because the mean of its divisors is an integer number (97925352).

Almost surely, 2^666824873 is an apocalyptic number.

It is an amenable number.

666824873 is a deficient number, since it is larger than the sum of its proper divisors (116577943).

666824873 is a wasteful number, since it uses less digits than its factorization.

666824873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663135.

The product of its digits is 2322432, while the sum is 50.

The square root of 666824873 is about 25822.9524454505. The cubic root of 666824873 is about 873.6495622519.

The spelling of 666824873 in words is "six hundred sixty-six million, eight hundred twenty-four thousand, eight hundred seventy-three".