866757888046128 has 160 divisors (see below), whose sum is σ = 2470288961387520. Its totient is φ = 260178368071680.

The previous prime is 866757888046111. The next prime is 866757888046151. The reversal of 866757888046128 is 821640888757668.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581009625 + ... + 582499527.

It is an arithmetic number, because the mean of its divisors is an integer number (15439306008672).

Almost surely, 2^{866757888046128} 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 866757888046128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235144480693760).

866757888046128 is an abundant number, since it is smaller than the sum of its proper divisors (1603531073341392).

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

866757888046128 is a wasteful number, since it uses less digits than its factorization.

866757888046128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512707 (or 1512701 counting only the distinct ones).

The product of its (nonzero) digits is 13872660480, while the sum is 84.

The spelling of 866757888046128 in words is "eight hundred sixty-six trillion, seven hundred fifty-seven billion, eight hundred eighty-eight million, forty-six thousand, one hundred twenty-eight".