866786278670277 has 32 divisors (see below), whose sum is σ = 1366366366310400. Its totient is φ = 478225596531648.

The previous prime is 866786278670261. The next prime is 866786278670401. The reversal of 866786278670277 is 772076872687668.

It is not a de Polignac number, because 866786278670277 - 2⁴ = 866786278670261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (87).

It is a junction number, because it is equal to n+sod(n) for n = 866786278670193 and 866786278670202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786278630277) 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, 245137474 + ... + 248648252.

It is an arithmetic number, because the mean of its divisors is an integer number (42698948947200).

Almost surely, 2^{866786278670277} is an apocalyptic number.

866786278670277 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

866786278670277 is a deficient number, since it is larger than the sum of its proper divisors (499580087640123).

866786278670277 is a wasteful number, since it uses less digits than its factorization.

866786278670277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916225.

The product of its (nonzero) digits is 44609273856, while the sum is 87.

The spelling of 866786278670277 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-eight million, six hundred seventy thousand, two hundred seventy-seven".