66624002 has 4 divisors (see below), whose sum is σ = 99936006. Its totient is φ = 33312000.

The previous prime is 66624001. The next prime is 66624007. The reversal of 66624002 is 20042666.

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., 58507201 + 8116801 = 7649^2 + 2849^2 .

It is not an unprimeable number, because it can be changed into a prime (66624001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16655999 + ... + 16656002.

Almost surely, 2^66624002 is an apocalyptic number.

66624002 is a deficient number, since it is larger than the sum of its proper divisors (33312004).

66624002 is a wasteful number, since it uses less digits than its factorization.

66624002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33312003.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66624002 is about 8162.3527245519. The cubic root of 66624002 is about 405.3936162060.

Adding to 66624002 its reverse (20042666), we get a palindrome (86666668).

The spelling of 66624002 in words is "sixty-six million, six hundred twenty-four thousand, two".