666164847 has 8 divisors (see below), whose sum is σ = 926838144. Its totient is φ = 424800728.

The previous prime is 666164831. The next prime is 666164857. The reversal of 666164847 is 748461666.

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 666164847 - 2⁴ = 666164831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666164796 and 666164805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666164827) 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, 4827213 + ... + 4827350.

It is an arithmetic number, because the mean of its divisors is an integer number (115854768).

Almost surely, 2^666164847 is an apocalyptic number.

666164847 is a deficient number, since it is larger than the sum of its proper divisors (260673297).

666164847 is a wasteful number, since it uses less digits than its factorization.

666164847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9654589.

The product of its digits is 1161216, while the sum is 48.

The square root of 666164847 is about 25810.1694492694. The cubic root of 666164847 is about 873.3612197876.

The spelling of 666164847 in words is "six hundred sixty-six million, one hundred sixty-four thousand, eight hundred forty-seven".