66746124122 has 4 divisors (see below), whose sum is σ = 100119186186. Its totient is φ = 33373062060.

The previous prime is 66746124121. The next prime is 66746124143. The reversal of 66746124122 is 22142164766.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 66518083921 + 228040201 = 257911^2 + 15101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66746124122.

It is not an unprimeable number, because it can be changed into a prime (66746124121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16686531029 + ... + 16686531032.

Almost surely, 2^66746124122 is an apocalyptic number.

66746124122 is a deficient number, since it is larger than the sum of its proper divisors (33373062064).

66746124122 is a wasteful number, since it uses less digits than its factorization.

66746124122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33373062063.

The product of its digits is 193536, while the sum is 41.

Adding to 66746124122 its reverse (22142164766), we get a palindrome (88888288888).

The spelling of 66746124122 in words is "sixty-six billion, seven hundred forty-six million, one hundred twenty-four thousand, one hundred twenty-two".