8666890 has 8 divisors (see below), whose sum is σ = 15600420. Its totient is φ = 3466752.

The previous prime is 8666881. The next prime is 8666891. The reversal of 8666890 is 986668.

It can be written as a sum of positive squares in 2 ways, for example, as 7414729 + 1252161 = 2723^2 + 1119^2 .

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

It is a super-2 number, since 2×8666890² = 150229964544200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8666891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433335 + ... + 433354.

Almost surely, 2^8666890 is an apocalyptic number.

8666890 is a deficient number, since it is larger than the sum of its proper divisors (6933530).

8666890 is a wasteful number, since it uses less digits than its factorization.

8666890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866696.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 8666890 is about 2943.9582198122. The cubic root of 8666890 is about 205.4097693119.

The spelling of 8666890 in words is "eight million, six hundred sixty-six thousand, eight hundred ninety".