66445051444 has 12 divisors (see below), whose sum is σ = 116287612000. Its totient is φ = 33220019448.

The previous prime is 66445051441. The next prime is 66445051447. The reversal of 66445051444 is 44415054466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66445051441) and next prime (66445051447).

It is a super-2 number, since 2×66445051444² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66445051444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66445051441) by changing a digit.

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, 566274 + ... + 673465.

Almost surely, 2^66445051444 is an apocalyptic number.

It is an amenable number.

66445051444 is a deficient number, since it is larger than the sum of its proper divisors (49842560556).

66445051444 is a wasteful number, since it uses less digits than its factorization.

66445051444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253142 (or 1253140 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 66445051444 in words is "sixty-six billion, four hundred forty-five million, fifty-one thousand, four hundred forty-four".