66439124047 has 4 divisors (see below), whose sum is σ = 66786973056. Its totient is φ = 66091275040.

The previous prime is 66439124023. The next prime is 66439124069. The reversal of 66439124047 is 74042193466.

66439124047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74042193466 = 2 ⋅37021096733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66439124047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66439123988 and 66439124006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66439124077) 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, 173924218 + ... + 173924599.

It is an arithmetic number, because the mean of its divisors is an integer number (16696743264).

Almost surely, 2^66439124047 is an apocalyptic number.

66439124047 is a deficient number, since it is larger than the sum of its proper divisors (347849009).

66439124047 is a wasteful number, since it uses less digits than its factorization.

66439124047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347849008.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 66439124047 in words is "sixty-six billion, four hundred thirty-nine million, one hundred twenty-four thousand, forty-seven".