66443510163020 has 24 divisors (see below), whose sum is σ = 139810993350000. Its totient is φ = 26524142730432.

The previous prime is 66443510163001. The next prime is 66443510163031. The reversal of 66443510163020 is 2036101534466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3328823195 + ... + 3328843154.

It is an arithmetic number, because the mean of its divisors is an integer number (5825458056250).

Almost surely, 2^{66443510163020} is an apocalyptic number.

It is an amenable number.

66443510163020 is an abundant number, since it is smaller than the sum of its proper divisors (73367483186980).

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

66443510163020 is a wasteful number, since it uses less digits than its factorization.

66443510163020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657666857 (or 6657666855 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

Adding to 66443510163020 its reverse (2036101534466), we get a palindrome (68479611697486).

The spelling of 66443510163020 in words is "sixty-six trillion, four hundred forty-three billion, five hundred ten million, one hundred sixty-three thousand, twenty".