66666444248 has 32 divisors (see below), whose sum is σ = 135168523200. Its totient is φ = 30704942592.

The previous prime is 66666444241. The next prime is 66666444253. The reversal of 66666444248 is 84244466666.

66666444248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66666444193 and 66666444202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666444241) 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, 5208443 + ... + 5221226.

It is an arithmetic number, because the mean of its divisors is an integer number (4224016350).

Almost surely, 2^66666444248 is an apocalyptic number.

66666444248 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66666444248 is an abundant number, since it is smaller than the sum of its proper divisors (68502078952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66666444248 is a wasteful number, since it uses less digits than its factorization.

66666444248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10429739 (or 10429735 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 56.

The spelling of 66666444248 in words is "sixty-six billion, six hundred sixty-six million, four hundred forty-four thousand, two hundred forty-eight".