66213354133 has 4 divisors (see below), whose sum is σ = 66213894208. Its totient is φ = 66212814060.

The previous prime is 66213354127. The next prime is 66213354149. The reversal of 66213354133 is 33145331266.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66213354133 - 2¹⁷ = 66213223061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66213354092 and 66213354101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66213354173) 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, 12178 + ... + 364108.

It is an arithmetic number, because the mean of its divisors is an integer number (16553473552).

Almost surely, 2^66213354133 is an apocalyptic number.

It is an amenable number.

66213354133 is a deficient number, since it is larger than the sum of its proper divisors (540075).

66213354133 is a wasteful number, since it uses less digits than its factorization.

66213354133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540074.

The product of its digits is 116640, while the sum is 37.

Adding to 66213354133 its reverse (33145331266), we get a palindrome (99358685399).

The spelling of 66213354133 in words is "sixty-six billion, two hundred thirteen million, three hundred fifty-four thousand, one hundred thirty-three".