866717995248 has 720 divisors, whose sum is σ = 3079892874240. Its totient is φ = 226001664000.

The previous prime is 866717995243. The next prime is 866717995303. The reversal of 866717995248 is 842599717668.

866717995248 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 1 + 7 + 99 + 524 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866717995243) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1442126148 + ... + 1442126748.

It is an arithmetic number, because the mean of its divisors is an integer number (4277628992).

Almost surely, 2^866717995248 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 866717995248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539946437120).

866717995248 is an abundant number, since it is smaller than the sum of its proper divisors (2213174878992).

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

866717995248 is a wasteful number, since it uses less digits than its factorization.

866717995248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1010 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 72.

The spelling of 866717995248 in words is "eight hundred sixty-six billion, seven hundred seventeen million, nine hundred ninety-five thousand, two hundred forty-eight".