785661166587 has 16 divisors (see below), whose sum is σ = 1142801637120. Its totient is φ = 476149216800.

The previous prime is 785661166453. The next prime is 785661166627.

785661166587 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 785661166587 - 2¹⁸ = 785660904443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (785661165587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1804489 + ... + 2197157.

It is an arithmetic number, because the mean of its divisors is an integer number (71425102320).

Almost surely, 2^785661166587 is an apocalyptic number.

785661166587 is a deficient number, since it is larger than the sum of its proper divisors (357140470533).

785661166587 is a wasteful number, since it uses less digits than its factorization.

785661166587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453314.

The product of its digits is 101606400, while the sum is 66.

The spelling of 785661166587 in words is "seven hundred eighty-five billion, six hundred sixty-one million, one hundred sixty-six thousand, five hundred eighty-seven".