8619666 has 32 divisors (see below), whose sum is σ = 19123776. Its totient is φ = 2568000.

The previous prime is 8619661. The next prime is 8619683. The reversal of 8619666 is 6669168.

It is not an unprimeable number, because it can be changed into a prime (8619661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2956 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (597618).

Almost surely, 2^8619666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8619666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9561888).

8619666 is an abundant number, since it is smaller than the sum of its proper divisors (10504110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8619666 is a wasteful number, since it uses less digits than its factorization.

8619666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218.

The product of its digits is 93312, while the sum is 42.

The square root of 8619666 is about 2935.9267702039. The cubic root of 8619666 is about 205.0360119166.

The spelling of 8619666 in words is "eight million, six hundred nineteen thousand, six hundred sixty-six".