166217610838 has 8 divisors (see below), whose sum is σ = 249634609560. Its totient is φ = 83006074320.

The previous prime is 166217610827. The next prime is 166217610859. The reversal of 166217610838 is 838016712661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×166217610838³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166217610791 and 166217610800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51363528 + ... + 51366763.

It is an arithmetic number, because the mean of its divisors is an integer number (31204326195).

Almost surely, 2^166217610838 is an apocalyptic number.

166217610838 is a deficient number, since it is larger than the sum of its proper divisors (83416998722).

166217610838 is a wasteful number, since it uses less digits than its factorization.

166217610838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102731102.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 166217610838 in words is "one hundred sixty-six billion, two hundred seventeen million, six hundred ten thousand, eight hundred thirty-eight".