8455664 has 40 divisors (see below), whose sum is σ = 19829088. Its totient is φ = 3409920.

The previous prime is 8455661. The next prime is 8455669. The reversal of 8455664 is 4665548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8455661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 4124.

Almost surely, 2^8455664 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 8455664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9914544).

8455664 is an abundant number, since it is smaller than the sum of its proper divisors (11373424).

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

8455664 is a wasteful number, since it uses less digits than its factorization.

8455664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473 (or 4467 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 8455664 is about 2907.8624451648. The cubic root of 8455664 is about 203.7273044840.

It can be divided in two parts, 8455 and 664, that added together give a palindrome (9119).

The spelling of 8455664 in words is "eight million, four hundred fifty-five thousand, six hundred sixty-four".