66605002 has 4 divisors (see below), whose sum is σ = 99907506. Its totient is φ = 33302500.

The previous prime is 66604999. The next prime is 66605009. The reversal of 66605002 is 20050666.

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., 66569281 + 35721 = 8159^2 + 189^2 .

It is not an unprimeable number, because it can be changed into a prime (66605009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16651249 + ... + 16651252.

Almost surely, 2^66605002 is an apocalyptic number.

66605002 is a deficient number, since it is larger than the sum of its proper divisors (33302504).

66605002 is a wasteful number, since it uses less digits than its factorization.

66605002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33302503.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66605002 is about 8161.1887614489. The cubic root of 66605002 is about 405.3550754859.

Adding to 66605002 its reverse (20050666), we get a palindrome (86655668).

The spelling of 66605002 in words is "sixty-six million, six hundred five thousand, two".