84518666 has 8 divisors (see below), whose sum is σ = 126934884. Its totient is φ = 42207040.

The previous prime is 84518663. The next prime is 84518677. The reversal of 84518666 is 66681548.

It can be written as a sum of positive squares in 2 ways, for example, as 76195441 + 8323225 = 8729^2 + 2885^2 .

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 (84518663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24095 + ... + 27378.

Almost surely, 2^84518666 is an apocalyptic number.

84518666 is a deficient number, since it is larger than the sum of its proper divisors (42416218).

84518666 is a wasteful number, since it uses less digits than its factorization.

84518666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52296.

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

The square root of 84518666 is about 9193.4033959138. The cubic root of 84518666 is about 438.8514570176.

It can be divided in two parts, 84518 and 666, that added together give a cube (85184 = 44³).

The spelling of 84518666 in words is "eighty-four million, five hundred eighteen thousand, six hundred sixty-six".