66213354122 has 4 divisors (see below), whose sum is σ = 99320031186. Its totient is φ = 33106677060.

The previous prime is 66213354089. The next prime is 66213354127. The reversal of 66213354122 is 22145331266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22145331266 = 2 ⋅11072665633.

It can be written as a sum of positive squares in only one way, i.e., 58418406601 + 7794947521 = 241699^2 + 88289^2 .

It is not an unprimeable number, because it can be changed into a prime (66213354127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16553338529 + ... + 16553338532.

Almost surely, 2^66213354122 is an apocalyptic number.

66213354122 is a deficient number, since it is larger than the sum of its proper divisors (33106677064).

66213354122 is a wasteful number, since it uses less digits than its factorization.

66213354122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33106677063.

The product of its digits is 51840, while the sum is 35.

Adding to 66213354122 its reverse (22145331266), we get a palindrome (88358685388).

The spelling of 66213354122 in words is "sixty-six billion, two hundred thirteen million, three hundred fifty-four thousand, one hundred twenty-two".