66644244246 has 8 divisors (see below), whose sum is σ = 133288488504. Its totient is φ = 22214748080.

The previous prime is 66644244239. The next prime is 66644244319. The reversal of 66644244246 is 64244244666.

It is a sphenic number, since it is the product of 3 distinct primes.

66644244246 is an admirable number.

It is a super-2 number, since 2×66644244246² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66644244195 and 66644244204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553687015 + ... + 5553687026.

It is an arithmetic number, because the mean of its divisors is an integer number (16661061063).

Almost surely, 2^66644244246 is an apocalyptic number.

66644244246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66644244246 is a wasteful number, since it uses less digits than its factorization.

66644244246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11107374046.

The product of its digits is 5308416, while the sum is 48.

The spelling of 66644244246 in words is "sixty-six billion, six hundred forty-four million, two hundred forty-four thousand, two hundred forty-six".