866786462176272 has 160 divisors (see below), whose sum is σ = 2445013060577280. Its totient is φ = 262420571842560.

The previous prime is 866786462176247. The next prime is 866786462176273. The reversal of 866786462176272 is 272671264687668.

It is a Smith number, since the sum of its digits (78) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (866786462176273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3892426629 + ... + 3892649307.

It is an arithmetic number, because the mean of its divisors is an integer number (15281331628608).

Almost surely, 2^{866786462176272} 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 866786462176272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222506530288640).

866786462176272 is an abundant number, since it is smaller than the sum of its proper divisors (1578226598401008).

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

866786462176272 is a wasteful number, since it uses less digits than its factorization.

866786462176272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229461 (or 229455 counting only the distinct ones).

The product of its digits is 5462360064, while the sum is 78.

The spelling of 866786462176272 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred sixty-two million, one hundred seventy-six thousand, two hundred seventy-two".