866786278583477 has 8 divisors (see below), whose sum is σ = 991700280475392. Its totient is φ = 742144124358000.

The previous prime is 866786278583441. The next prime is 866786278583527. The reversal of 866786278583477 is 774385872687668.

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

It is not a de Polignac number, because 866786278583477 - 2²⁴ = 866786261806261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786878583477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67961909774 + ... + 67961922527.

It is an arithmetic number, because the mean of its divisors is an integer number (123962535059424).

Almost surely, 2^{866786278583477} is an apocalyptic number.

It is an amenable number.

866786278583477 is a deficient number, since it is larger than the sum of its proper divisors (124914001891915).

866786278583477 is a wasteful number, since it uses less digits than its factorization.

866786278583477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135923833219.

The product of its digits is 254910136320, while the sum is 92.

The spelling of 866786278583477 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-eight million, five hundred eighty-three thousand, four hundred seventy-seven".