66345602 has 4 divisors (see below), whose sum is σ = 99518406. Its totient is φ = 33172800.

The previous prime is 66345599. The next prime is 66345607. The reversal of 66345602 is 20654366.

66345602 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., 52722121 + 13623481 = 7261^2 + 3691^2 .

It is not an unprimeable number, because it can be changed into a prime (66345607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16586399 + ... + 16586402.

Almost surely, 2^66345602 is an apocalyptic number.

66345602 is a deficient number, since it is larger than the sum of its proper divisors (33172804).

66345602 is a wasteful number, since it uses less digits than its factorization.

66345602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33172803.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66345602 is about 8145.2809650742. The cubic root of 66345602 is about 404.8281585668.

Adding to 66345602 its reverse (20654366), we get a palindrome (86999968).

The spelling of 66345602 in words is "sixty-six million, three hundred forty-five thousand, six hundred two".