66145414468 has 48 divisors (see below), whose sum is σ = 136137222144. Its totient is φ = 27533020320.

The previous prime is 66145414463. The next prime is 66145414471. The reversal of 66145414468 is 86441454166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66145414463) 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 15 ways as a sum of consecutive naturals, for example, 19446 + ... + 364237.

It is an arithmetic number, because the mean of its divisors is an integer number (2836192128).

Almost surely, 2^66145414468 is an apocalyptic number.

It is an amenable number.

66145414468 is an abundant number, since it is smaller than the sum of its proper divisors (69991807676).

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

66145414468 is a wasteful number, since it uses less digits than its factorization.

66145414468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383872 (or 383870 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 49.

The spelling of 66145414468 in words is "sixty-six billion, one hundred forty-five million, four hundred fourteen thousand, four hundred sixty-eight".