8621660 has 12 divisors (see below), whose sum is σ = 18105528. Its totient is φ = 3448656.

The previous prime is 8621653. The next prime is 8621677. The reversal of 8621660 is 661268.

8621660 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215522 + ... + 215561.

It is an arithmetic number, because the mean of its divisors is an integer number (1508794).

Almost surely, 2^8621660 is an apocalyptic number.

It is an amenable number.

8621660 is an abundant number, since it is smaller than the sum of its proper divisors (9483868).

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

8621660 is a wasteful number, since it uses less digits than its factorization.

8621660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431092 (or 431090 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 8621660 is about 2936.2663366936. The cubic root of 8621660 is about 205.0518211249.

The spelling of 8621660 in words is "eight million, six hundred twenty-one thousand, six hundred sixty".