866761280451606 has 8 divisors (see below), whose sum is σ = 1733522560903224. Its totient is φ = 288920426817200.

The previous prime is 866761280451581. The next prime is 866761280451631. The reversal of 866761280451606 is 606154082167668.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (866761280451581) and next prime (866761280451631).

It is a sphenic number, since it is the product of 3 distinct primes.

866761280451606 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72230106704295 + ... + 72230106704306.

It is an arithmetic number, because the mean of its divisors is an integer number (216690320112903).

Almost surely, 2^{866761280451606} is an apocalyptic number.

866761280451606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866761280451606 is a wasteful number, since it uses less digits than its factorization.

866761280451606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144460213408606.

The product of its (nonzero) digits is 139345920, while the sum is 66.

The spelling of 866761280451606 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred eighty million, four hundred fifty-one thousand, six hundred six".