66445051443 has 8 divisors (see below), whose sum is σ = 88634407056. Its totient is φ = 44276198400.

The previous prime is 66445051441. The next prime is 66445051447. The reversal of 66445051443 is 34415054466.

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

It is not a de Polignac number, because 66445051443 - 2¹ = 66445051441 is a prime.

It is a super-2 number, since 2×66445051443² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66445051395 and 66445051404.

It is not an unprimeable number, because it can be changed into a prime (66445051441) 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, 5118078 + ... + 5131043.

It is an arithmetic number, because the mean of its divisors is an integer number (11079300882).

Almost surely, 2^66445051443 is an apocalyptic number.

66445051443 is a deficient number, since it is larger than the sum of its proper divisors (22189355613).

66445051443 is a wasteful number, since it uses less digits than its factorization.

66445051443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10251285.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 66445051443 in words is "sixty-six billion, four hundred forty-five million, fifty-one thousand, four hundred forty-three".