8615664 has 120 divisors (see below), whose sum is σ = 26307840. Its totient is φ = 2623104.

The previous prime is 8615657. The next prime is 8615693. The reversal of 8615664 is 4665168.

8615664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128559 + ... + 128625.

It is an arithmetic number, because the mean of its divisors is an integer number (219232).

Almost surely, 2^8615664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8615664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13153920).

8615664 is an abundant number, since it is smaller than the sum of its proper divisors (17692176).

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

8615664 is a wasteful number, since it uses less digits than its factorization.

8615664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 138 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 8615664 is about 2935.2451345671. The cubic root of 8615664 is about 205.0042751438.

The spelling of 8615664 in words is "eight million, six hundred fifteen thousand, six hundred sixty-four".