66214887733 has 4 divisors (see below), whose sum is σ = 66266659840. Its totient is φ = 66163115628.

The previous prime is 66214887721. The next prime is 66214887779. The reversal of 66214887733 is 33778841266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33778841266 = 2 ⋅16889420633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66214887733 is a prime.

It is a super-2 number, since 2×66214887733² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66214882733) by changing a digit.

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, 25884135 + ... + 25886692.

It is an arithmetic number, because the mean of its divisors is an integer number (16566664960).

Almost surely, 2^66214887733 is an apocalyptic number.

It is an amenable number.

66214887733 is a deficient number, since it is larger than the sum of its proper divisors (51772107).

66214887733 is a wasteful number, since it uses less digits than its factorization.

66214887733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51772106.

The product of its digits is 8128512, while the sum is 55.

The spelling of 66214887733 in words is "sixty-six billion, two hundred fourteen million, eight hundred eighty-seven thousand, seven hundred thirty-three".