8668557 has 6 divisors (see below), whose sum is σ = 12521262. Its totient is φ = 5779032.

The previous prime is 8668553. The next prime is 8668571. The reversal of 8668557 is 7558668.

It can be written as a sum of positive squares in only one way, i.e., 5503716 + 3164841 = 2346^2 + 1779^2 .

It is not a de Polignac number, because 8668557 - 2² = 8668553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8668553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 481578 + ... + 481595.

It is an arithmetic number, because the mean of its divisors is an integer number (2086877).

Almost surely, 2^8668557 is an apocalyptic number.

It is an amenable number.

8668557 is a deficient number, since it is larger than the sum of its proper divisors (3852705).

8668557 is a wasteful number, since it uses less digits than its factorization.

8668557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963179 (or 963176 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 8668557 is about 2944.2413284240. The cubic root of 8668557 is about 205.4229380546.

The spelling of 8668557 in words is "eight million, six hundred sixty-eight thousand, five hundred fifty-seven".