66630003 has 16 divisors (see below), whose sum is σ = 97880832. Its totient is φ = 39980000.

The previous prime is 66629989. The next prime is 66630013. The reversal of 66630003 is 30003666.

It is a cyclic number.

It is not a de Polignac number, because 66630003 - 2⁵ = 66629971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66630013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6663 + ... + 13328.

It is an arithmetic number, because the mean of its divisors is an integer number (6117552).

Almost surely, 2^66630003 is an apocalyptic number.

66630003 is a deficient number, since it is larger than the sum of its proper divisors (31250829).

66630003 is a wasteful number, since it uses less digits than its factorization.

66630003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20106.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 66630003 is about 8162.7203186193. The cubic root of 66630003 is about 405.4057874655.

Adding to 66630003 its reverse (30003666), we get a palindrome (96633669).

The spelling of 66630003 in words is "sixty-six million, six hundred thirty thousand, three".