64866608280 has 192 divisors, whose sum is σ = 223937213760. Its totient is φ = 16227753984.

The previous prime is 64866608269. The next prime is 64866608293. The reversal of 64866608280 is 8280666846.

It is a happy number.

64866608280 is digitally balanced in base 2, 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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1898629 + ... + 1932491.

It is an arithmetic number, because the mean of its divisors is an integer number (1166339655).

Almost surely, 2^64866608280 is an apocalyptic number.

64866608280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64866608280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111968606880).

64866608280 is an abundant number, since it is smaller than the sum of its proper divisors (159070605480).

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

64866608280 is a wasteful number, since it uses less digits than its factorization.

64866608280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34210 (or 34203 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 64866608280 in words is "sixty-four billion, eight hundred sixty-six million, six hundred eight thousand, two hundred eighty".