168668553 has 8 divisors (see below), whose sum is σ = 232646400. Its totient is φ = 108568208.

The previous prime is 168668531. The next prime is 168668557. The reversal of 168668553 is 355866861.

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 168668553 - 2¹³ = 168660361 is a prime.

It is a super-2 number, since 2×168668553² = 56898161542227618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168668557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969273 + ... + 969446.

It is an arithmetic number, because the mean of its divisors is an integer number (29080800).

Almost surely, 2^168668553 is an apocalyptic number.

It is an amenable number.

168668553 is a deficient number, since it is larger than the sum of its proper divisors (63977847).

168668553 is a wasteful number, since it uses less digits than its factorization.

168668553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938751.

The product of its digits is 1036800, while the sum is 48.

The square root of 168668553 is about 12987.2457819200. The cubic root of 168668553 is about 552.5158058035.

The spelling of 168668553 in words is "one hundred sixty-eight million, six hundred sixty-eight thousand, five hundred fifty-three".