866827636617770 has 16 divisors (see below), whose sum is σ = 1562701322037888. Its totient is φ = 346195148841360.

The previous prime is 866827636617769. The next prime is 866827636617797. The reversal of 866827636617770 is 77716636728668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66988218926 + ... + 66988231865.

It is an arithmetic number, because the mean of its divisors is an integer number (97668832627368).

Almost surely, 2^{866827636617770} is an apocalyptic number.

866827636617770 is a deficient number, since it is larger than the sum of its proper divisors (695873685420118).

866827636617770 is a wasteful number, since it uses less digits than its factorization.

866827636617770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133976451445.

The product of its (nonzero) digits is 7169347584, while the sum is 80.

The spelling of 866827636617770 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, six hundred thirty-six million, six hundred seventeen thousand, seven hundred seventy".