166863158623 has 8 divisors (see below), whose sum is σ = 201918444192. Its totient is φ = 134612295936.

The previous prime is 166863158603. The next prime is 166863158713. The reversal of 166863158623 is 326851368661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166863158623 is a prime.

It is a super-2 number, since 2×166863158623² (a number of 23 digits) 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 (166863158603) 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, 701105590 + ... + 701105827.

It is an arithmetic number, because the mean of its divisors is an integer number (25239805524).

Almost surely, 2^166863158623 is an apocalyptic number.

166863158623 is a deficient number, since it is larger than the sum of its proper divisors (35055285569).

166863158623 is a wasteful number, since it uses less digits than its factorization.

166863158623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402211441.

The product of its digits is 7464960, while the sum is 55.

The spelling of 166863158623 in words is "one hundred sixty-six billion, eight hundred sixty-three million, one hundred fifty-eight thousand, six hundred twenty-three".