84166666755 has 16 divisors (see below), whose sum is σ = 136371310080. Its totient is φ = 44320674528.

The previous prime is 84166666751. The next prime is 84166666757. The reversal of 84166666755 is 55766666148.

It is not a de Polignac number, because 84166666755 - 2² = 84166666751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84166666751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35512177 + ... + 35514546.

It is an arithmetic number, because the mean of its divisors is an integer number (8523206880).

Almost surely, 2^84166666755 is an apocalyptic number.

84166666755 is a deficient number, since it is larger than the sum of its proper divisors (52204643325).

84166666755 is a wasteful number, since it uses less digits than its factorization.

84166666755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71026810.

The product of its digits is 43545600, while the sum is 60.

The spelling of 84166666755 in words is "eighty-four billion, one hundred sixty-six million, six hundred sixty-six thousand, seven hundred fifty-five".