66120306403 has 8 divisors (see below), whose sum is σ = 67402530000. Its totient is φ = 64839367008.

The previous prime is 66120306397. The next prime is 66120306407. The reversal of 66120306403 is 30460302166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66120306403 - 2²⁵ = 66086751971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66120306407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216753 + ... + 423346.

It is an arithmetic number, because the mean of its divisors is an integer number (8425316250).

Almost surely, 2^66120306403 is an apocalyptic number.

66120306403 is a deficient number, since it is larger than the sum of its proper divisors (1282223597).

66120306403 is a wasteful number, since it uses less digits than its factorization.

66120306403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642101.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 66120306403 its reverse (30460302166), we get a palindrome (96580608569).

The spelling of 66120306403 in words is "sixty-six billion, one hundred twenty million, three hundred six thousand, four hundred three".