66730063 has 4 divisors (see below), whose sum is σ = 66884608. Its totient is φ = 66575520.

The previous prime is 66730051. The next prime is 66730087. The reversal of 66730063 is 36003766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66730063 - 2⁵ = 66730031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66730163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76623 + ... + 77488.

It is an arithmetic number, because the mean of its divisors is an integer number (16721152).

Almost surely, 2^66730063 is an apocalyptic number.

66730063 is a deficient number, since it is larger than the sum of its proper divisors (154545).

66730063 is a wasteful number, since it uses less digits than its factorization.

66730063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154544.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 66730063 is about 8168.8471034779. The cubic root of 66730063 is about 405.6086220865.

The spelling of 66730063 in words is "sixty-six million, seven hundred thirty thousand, sixty-three".