4166855685 has 24 divisors (see below), whose sum is σ = 7275279960. Its totient is φ = 2206098432.

The previous prime is 4166855659. The next prime is 4166855687. The reversal of 4166855685 is 5865586614.

4166855685 is a `hidden beast` number, since 4 + 1 + 6 + 6 + 8 + 556 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1432925316 + 2733930369 = 37854^2 + 52287^2 .

It is not a de Polignac number, because 4166855685 - 2¹³ = 4166847493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166855687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331780 + ... + 344109.

It is an arithmetic number, because the mean of its divisors is an integer number (303136665).

Almost surely, 2^4166855685 is an apocalyptic number.

4166855685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4166855685 is a deficient number, since it is larger than the sum of its proper divisors (3108424275).

4166855685 is a wasteful number, since it uses less digits than its factorization.

4166855685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676037 (or 676034 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The square root of 4166855685 is about 64551.1865499001. The cubic root of 4166855685 is about 1609.1733066674.

The spelling of 4166855685 in words is "four billion, one hundred sixty-six million, eight hundred fifty-five thousand, six hundred eighty-five".