66086840 has 16 divisors (see below), whose sum is σ = 148695480. Its totient is φ = 26434720.

The previous prime is 66086833. The next prime is 66086849. The reversal of 66086840 is 4868066.

It is a junction number, because it is equal to n+sod(n) for n = 66086794 and 66086803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66086849) 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, 826046 + ... + 826125.

Almost surely, 2^66086840 is an apocalyptic number.

It is an amenable number.

66086840 is an abundant number, since it is smaller than the sum of its proper divisors (82608640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66086840 is a wasteful number, since it uses less digits than its factorization.

66086840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652182 (or 1652178 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 66086840 is about 8129.3812802697. The cubic root of 66086840 is about 404.3011674551.

The spelling of 66086840 in words is "sixty-six million, eighty-six thousand, eight hundred forty".