866061608192 has 108 divisors (see below), whose sum is σ = 1961483948928. Its totient is φ = 380965094400.

The previous prime is 866061608173. The next prime is 866061608227. The reversal of 866061608192 is 291806160668.

It is a super-2 number, since 2×866061608192² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509303 + ... + 1411209.

It is an arithmetic number, because the mean of its divisors is an integer number (18161888416).

Almost surely, 2^866061608192 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 866061608192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980741974464).

866061608192 is an abundant number, since it is smaller than the sum of its proper divisors (1095422340736).

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

866061608192 is a wasteful number, since it uses less digits than its factorization.

866061608192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901976 (or 901951 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 866061608192 in words is "eight hundred sixty-six billion, sixty-one million, six hundred eight thousand, one hundred ninety-two".