870617771401666 has 8 divisors (see below), whose sum is σ = 1305930391365564. Its totient is φ = 435307640946480.

The previous prime is 870617771401627. The next prime is 870617771401669. The reversal of 870617771401666 is 666104177716078.

It can be written as a sum of positive squares in 2 ways, for example, as 861054431625441 + 9563339776225 = 29343729^2 + 3092465^2 .

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

It is not an unprimeable number, because it can be changed into a prime (870617771401669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621502645 + ... + 622901896.

Almost surely, 2^{870617771401666} is an apocalyptic number.

870617771401666 is a deficient number, since it is larger than the sum of its proper divisors (435312619963898).

870617771401666 is a wasteful number, since it uses less digits than its factorization.

870617771401666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244754356.

The product of its (nonzero) digits is 99574272, while the sum is 67.

The spelling of 870617771401666 in words is "eight hundred seventy trillion, six hundred seventeen billion, seven hundred seventy-one million, four hundred one thousand, six hundred sixty-six".