66311407003 has 4 divisors (see below), whose sum is σ = 66317672808. Its totient is φ = 66305141200.

The previous prime is 66311406977. The next prime is 66311407013. The reversal of 66311407003 is 30070411366.

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 66311407003 - 2⁵ = 66311406971 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66311407013) 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, 3117001 + ... + 3138202.

It is an arithmetic number, because the mean of its divisors is an integer number (16579418202).

Almost surely, 2^66311407003 is an apocalyptic number.

66311407003 is a deficient number, since it is larger than the sum of its proper divisors (6265805).

66311407003 is a wasteful number, since it uses less digits than its factorization.

66311407003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265804.

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 66311407003 its reverse (30070411366), we get a palindrome (96381818369).

The spelling of 66311407003 in words is "sixty-six billion, three hundred eleven million, four hundred seven thousand, three".