66020602 has 4 divisors (see below), whose sum is σ = 99030906. Its totient is φ = 33010300.

The previous prime is 66020593. The next prime is 66020621. The reversal of 66020602 is 20602066.

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., 55965361 + 10055241 = 7481^2 + 3171^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16505149 + ... + 16505152.

Almost surely, 2^66020602 is an apocalyptic number.

66020602 is a deficient number, since it is larger than the sum of its proper divisors (33010304).

66020602 is a wasteful number, since it uses less digits than its factorization.

66020602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33010303.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66020602 is about 8125.3062711506. The cubic root of 66020602 is about 404.1660469942.

Adding to 66020602 its reverse (20602066), we get a palindrome (86622668).

The spelling of 66020602 in words is "sixty-six million, twenty thousand, six hundred two".