66130145254644 has 12 divisors (see below), whose sum is σ = 154303672260864. Its totient is φ = 22043381751544.

The previous prime is 66130145254549. The next prime is 66130145254711. The reversal of 66130145254644 is 44645254103166.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×66130145254644² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2755422718932 + ... + 2755422718955.

It is an arithmetic number, because the mean of its divisors is an integer number (12858639355072).

Almost surely, 2^{66130145254644} is an apocalyptic number.

It is an amenable number.

66130145254644 is an abundant number, since it is smaller than the sum of its proper divisors (88173527006220).

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

66130145254644 is a wasteful number, since it uses less digits than its factorization.

66130145254644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510845437894 (or 5510845437892 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 51.

The spelling of 66130145254644 in words is "sixty-six trillion, one hundred thirty billion, one hundred forty-five million, two hundred fifty-four thousand, six hundred forty-four".