66312103 has 32 divisors (see below), whose sum is σ = 81510912. Its totient is φ = 53136000.

The previous prime is 66312079. The next prime is 66312107. The reversal of 66312103 is 30121366.

It is a cyclic number.

It is not a de Polignac number, because 66312103 - 2⁹ = 66311591 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 (66312107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439078 + ... + 439228.

It is an arithmetic number, because the mean of its divisors is an integer number (2547216).

Almost surely, 2^66312103 is an apocalyptic number.

66312103 is a deficient number, since it is larger than the sum of its proper divisors (15198809).

66312103 is a wasteful number, since it uses less digits than its factorization.

66312103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 66312103 is about 8143.2243613940. The cubic root of 66312103 is about 404.7600122684.

Adding to 66312103 its reverse (30121366), we get a palindrome (96433469).

The spelling of 66312103 in words is "sixty-six million, three hundred twelve thousand, one hundred three".