66202620266 has 4 divisors (see below), whose sum is σ = 99303930402. Its totient is φ = 33101310132.

The previous prime is 66202620149. The next prime is 66202620293.

66202620266 is nontrivially palindromic in base 10.

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., 57922530241 + 8280090025 = 240671^2 + 90995^2 .

It is an unprimeable number.

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, 16550655065 + ... + 16550655068.

Almost surely, 2^66202620266 is an apocalyptic number.

66202620266 is a deficient number, since it is larger than the sum of its proper divisors (33101310136).

66202620266 is a wasteful number, since it uses less digits than its factorization.

66202620266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33101310135.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 66202620266 in words is "sixty-six billion, two hundred two million, six hundred twenty thousand, two hundred sixty-six".