84664656 has 80 divisors (see below), whose sum is σ = 253614720. Its totient is φ = 26991360.

The previous prime is 84664651. The next prime is 84664663. The reversal of 84664656 is 65646648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84664651) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5676 + ... + 14196.

It is an arithmetic number, because the mean of its divisors is an integer number (3170184).

Almost surely, 2^84664656 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 84664656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126807360).

84664656 is an abundant number, since it is smaller than the sum of its proper divisors (168950064).

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

84664656 is a wasteful number, since it uses less digits than its factorization.

84664656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561 (or 8549 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 84664656 is about 9201.3399024273. The cubic root of 84664656 is about 439.1039892853.

It can be divided in two parts, 8 and 4664656, that added together give a palindrome (4664664).

The spelling of 84664656 in words is "eighty-four million, six hundred sixty-four thousand, six hundred fifty-six".