84166685 has 4 divisors (see below), whose sum is σ = 101000028. Its totient is φ = 67333344.

The previous prime is 84166681. The next prime is 84166697. The reversal of 84166685 is 58666148.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34351321 + 49815364 = 5861^2 + 7058^2 .

It is a cyclic number.

It is not a de Polignac number, because 84166685 - 2² = 84166681 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 (84166681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8416664 + ... + 8416673.

It is an arithmetic number, because the mean of its divisors is an integer number (25250007).

Almost surely, 2^84166685 is an apocalyptic number.

It is an amenable number.

84166685 is a deficient number, since it is larger than the sum of its proper divisors (16833343).

84166685 is a wasteful number, since it uses less digits than its factorization.

84166685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16833342.

The product of its digits is 276480, while the sum is 44.

The square root of 84166685 is about 9174.2402955231. The cubic root of 84166685 is about 438.2414051880.

The spelling of 84166685 in words is "eighty-four million, one hundred sixty-six thousand, six hundred eighty-five".