66202602442 has 4 divisors (see below), whose sum is σ = 99303903666. Its totient is φ = 33101301220.

The previous prime is 66202602421. The next prime is 66202602449. The reversal of 66202602442 is 24420620266.

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., 57331034721 + 8871567721 = 239439^2 + 94189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66202602398 and 66202602407.

It is not an unprimeable number, because it can be changed into a prime (66202602449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16550650609 + ... + 16550650612.

Almost surely, 2^66202602442 is an apocalyptic number.

66202602442 is a deficient number, since it is larger than the sum of its proper divisors (33101301224).

66202602442 is a wasteful number, since it uses less digits than its factorization.

66202602442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33101301223.

The product of its (nonzero) digits is 55296, while the sum is 34.

It can be divided in two parts, 6620 and 2602442, that added together give a palindrome (2609062).

The spelling of 66202602442 in words is "sixty-six billion, two hundred two million, six hundred two thousand, four hundred forty-two".