866350730544 has 160 divisors (see below), whose sum is σ = 2467451906304. Its totient is φ = 260246891520.

The previous prime is 866350730521. The next prime is 866350730551. The reversal of 866350730544 is 445037053668.

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, 67905414 + ... + 67918170.

Almost surely, 2^866350730544 is an apocalyptic number.

866350730544 is the 497523-rd nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866350730544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1233725953152).

866350730544 is an abundant number, since it is smaller than the sum of its proper divisors (1601101175760).

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

866350730544 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (866350730543) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (15355).

866350730544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15355 (or 15349 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 866350730544 in words is "eight hundred sixty-six billion, three hundred fifty million, seven hundred thirty thousand, five hundred forty-four".