66414022985 has 4 divisors (see below), whose sum is σ = 79696827588. Its totient is φ = 53131218384.

The previous prime is 66414022973. The next prime is 66414023023. The reversal of 66414022985 is 58922041466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22036808704 + 44377214281 = 148448^2 + 210659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66414022985 is a prime.

It is a super-3 number, since 3×66414022985³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6641402294 + ... + 6641402303.

It is an arithmetic number, because the mean of its divisors is an integer number (19924206897).

Almost surely, 2^66414022985 is an apocalyptic number.

It is an amenable number.

66414022985 is a deficient number, since it is larger than the sum of its proper divisors (13282804603).

66414022985 is a wasteful number, since it uses less digits than its factorization.

66414022985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13282804602.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 66414022985 in words is "sixty-six billion, four hundred fourteen million, twenty-two thousand, nine hundred eighty-five".