660202066 has 4 divisors (see below), whose sum is σ = 990303102. Its totient is φ = 330101032.

The previous prime is 660202061. The next prime is 660202069.

660202066 is nontrivially palindromic in base 10.

660202066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 504676225 + 155525841 = 22465^2 + 12471^2 .

It is not an unprimeable number, because it can be changed into a prime (660202061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165050515 + ... + 165050518.

Almost surely, 2^660202066 is an apocalyptic number.

660202066 is a deficient number, since it is larger than the sum of its proper divisors (330101036).

660202066 is a wasteful number, since it uses less digits than its factorization.

660202066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330101035.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 660202066 is about 25694.3975605578. The cubic root of 660202066 is about 870.7476138565.

It can be divided in two parts, 66020 and 2066, that added together give a palindrome (68086).

The spelling of 660202066 in words is "six hundred sixty million, two hundred two thousand, sixty-six".