866124423880320 has 384 divisors, whose sum is σ = 3036021474024000. Its totient is φ = 209868927713280.

The previous prime is 866124423880277. The next prime is 866124423880349. The reversal of 866124423880320 is 23088324421668.

It is a tau number, because it is divible by the number of its divisors (384).

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, 484424151 + ... + 486208809.

Almost surely, 2^{866124423880320} is an apocalyptic number.

866124423880320 is a gapful number since it is divisible by the number (80) 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 866124423880320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518010737012000).

866124423880320 is an abundant number, since it is smaller than the sum of its proper divisors (2169897050143680).

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

866124423880320 is a wasteful number, since it uses less digits than its factorization.

866124423880320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786792 (or 1786769 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 57.

The spelling of 866124423880320 in words is "eight hundred sixty-six trillion, one hundred twenty-four billion, four hundred twenty-three million, eight hundred eighty thousand, three hundred twenty".