66113685 has 48 divisors (see below), whose sum is σ = 128831040. Its totient is φ = 31903200.

The previous prime is 66113683. The next prime is 66113687. The reversal of 66113685 is 58631166.

It is a happy number.

66113685 is a `hidden beast` number, since 6 + 611 + 36 + 8 + 5 = 666.

66113685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66113683) and next prime (66113687).

It is not a de Polignac number, because 66113685 - 2¹ = 66113683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66113681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313230 + ... + 313440.

It is an arithmetic number, because the mean of its divisors is an integer number (2683980).

Almost surely, 2^66113685 is an apocalyptic number.

It is an amenable number.

66113685 is a deficient number, since it is larger than the sum of its proper divisors (62717355).

66113685 is a wasteful number, since it uses less digits than its factorization.

66113685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 230 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 66113685 is about 8131.0322222950. The cubic root of 66113685 is about 404.3559034943.

It can be divided in two parts, 6611 and 3685, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 66113685 in words is "sixty-six million, one hundred thirteen thousand, six hundred eighty-five".