66548312943 has 16 divisors (see below), whose sum is σ = 101737278720. Its totient is φ = 37903735296.

The previous prime is 66548312939. The next prime is 66548312947. The reversal of 66548312943 is 34921384566.

It is an interprime number because it is at equal distance from previous prime (66548312939) and next prime (66548312947).

It is not a de Polignac number, because 66548312943 - 2² = 66548312939 is a prime.

It is a super-2 number, since 2×66548312943² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66548312947) 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, 5154738 + ... + 5167631.

It is an arithmetic number, because the mean of its divisors is an integer number (6358579920).

Almost surely, 2^66548312943 is an apocalyptic number.

66548312943 is a deficient number, since it is larger than the sum of its proper divisors (35188965777).

66548312943 is a wasteful number, since it uses less digits than its factorization.

66548312943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10322686.

The product of its digits is 3732480, while the sum is 51.

The spelling of 66548312943 in words is "sixty-six billion, five hundred forty-eight million, three hundred twelve thousand, nine hundred forty-three".