64986880 has 72 divisors (see below), whose sum is σ = 177926112. Its totient is φ = 22278144.

The previous prime is 64986877. The next prime is 64986893. The reversal of 64986880 is 8868946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5334 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (2471196).

Almost surely, 2^64986880 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 64986880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88963056).

64986880 is an abundant number, since it is smaller than the sum of its proper divisors (112939232).

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

64986880 is an equidigital number, since it uses as much as digits as its factorization.

64986880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7281 (or 7267 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 64986880 is about 8061.4440393766. Note that the first 3 decimals coincide. The cubic root of 64986880 is about 402.0455217709.

The spelling of 64986880 in words is "sixty-four million, nine hundred eighty-six thousand, eight hundred eighty".