66340624185 has 128 divisors (see below), whose sum is σ = 133225758720. Its totient is φ = 31030387200.

The previous prime is 66340624177. The next prime is 66340624193. The reversal of 66340624185 is 58142604366.

66340624185 is a `hidden beast` number, since 6 + 6 + 3 + 4 + 0 + 624 + 18 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (66340624177) and next prime (66340624193).

It is not a de Polignac number, because 66340624185 - 2³ = 66340624177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66340624185.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15972069 + ... + 15976221.

It is an arithmetic number, because the mean of its divisors is an integer number (1040826240).

Almost surely, 2^66340624185 is an apocalyptic number.

It is an amenable number.

66340624185 is an abundant number, since it is smaller than the sum of its proper divisors (66885134535).

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

66340624185 is a wasteful number, since it uses less digits than its factorization.

66340624185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 66340624185 in words is "sixty-six billion, three hundred forty million, six hundred twenty-four thousand, one hundred eighty-five".