66244042422646 has 32 divisors (see below), whose sum is σ = 108668131846560. Its totient is φ = 30036269664000.

The previous prime is 66244042422461. The next prime is 66244042422653. The reversal of 66244042422646 is 64622424044266.

It is a junction number, because it is equal to n+sod(n) for n = 66244042422593 and 66244042422602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299531860 + ... + 299752936.

It is an arithmetic number, because the mean of its divisors is an integer number (3395879120205).

Almost surely, 2^{66244042422646} is an apocalyptic number.

66244042422646 is a deficient number, since it is larger than the sum of its proper divisors (42424089423914).

66244042422646 is a wasteful number, since it uses less digits than its factorization.

66244042422646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254800.

The product of its (nonzero) digits is 21233664, while the sum is 52.

The spelling of 66244042422646 in words is "sixty-six trillion, two hundred forty-four billion, forty-two million, four hundred twenty-two thousand, six hundred forty-six".