66664323147 has 16 divisors (see below), whose sum is σ = 91871843328. Its totient is φ = 42953555040.

The previous prime is 66664323139. The next prime is 66664323149. The reversal of 66664323147 is 74132346666.

It is not a de Polignac number, because 66664323147 - 2³ = 66664323139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66664323096 and 66664323105.

It is not an unprimeable number, because it can be changed into a prime (66664323149) 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, 391773 + ... + 535550.

It is an arithmetic number, because the mean of its divisors is an integer number (5741990208).

Almost surely, 2^66664323147 is an apocalyptic number.

66664323147 is a deficient number, since it is larger than the sum of its proper divisors (25207520181).

66664323147 is a wasteful number, since it uses less digits than its factorization.

66664323147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928130.

The product of its digits is 2612736, while the sum is 48.

The spelling of 66664323147 in words is "sixty-six billion, six hundred sixty-four million, three hundred twenty-three thousand, one hundred forty-seven".