66439130043 has 48 divisors (see below), whose sum is σ = 105623243136. Its totient is φ = 36821041920.

The previous prime is 66439130011. The next prime is 66439130071. The reversal of 66439130043 is 34003193466.

It is not a de Polignac number, because 66439130043 - 2⁵ = 66439130011 is a prime.

It is a super-3 number, since 3×66439130043³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 66439129983 and 66439130010.

It is not an unprimeable number, because it can be changed into a prime (66439130543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541071 + ... + 652407.

It is an arithmetic number, because the mean of its divisors is an integer number (2200484232).

Almost surely, 2^66439130043 is an apocalyptic number.

66439130043 is a deficient number, since it is larger than the sum of its proper divisors (39184113093).

66439130043 is a wasteful number, since it uses less digits than its factorization.

66439130043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111484 (or 111471 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 39.

The spelling of 66439130043 in words is "sixty-six billion, four hundred thirty-nine million, one hundred thirty thousand, forty-three".