66618002 has 24 divisors (see below), whose sum is σ = 116305308. Its totient is φ = 28497920.

The previous prime is 66617983. The next prime is 66618007. The reversal of 66618002 is 20081666.

It can be written as a sum of positive squares in 2 ways, for example, as 52548001 + 14070001 = 7249^2 + 3751^2 .

It is not an unprimeable number, because it can be changed into a prime (66618007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3983 + ... + 12210.

Almost surely, 2^66618002 is an apocalyptic number.

66618002 is a deficient number, since it is larger than the sum of its proper divisors (49687306).

66618002 is a wasteful number, since it uses less digits than its factorization.

66618002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16234 (or 16223 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 66618002 is about 8161.9851751887. The cubic root of 66618002 is about 405.3814462440.

Adding to 66618002 its reverse (20081666), we get a palindrome (86699668).

The spelling of 66618002 in words is "sixty-six million, six hundred eighteen thousand, two".