66141472564 has 6 divisors (see below), whose sum is σ = 115747576994. Its totient is φ = 33070736280.

The previous prime is 66141472561. The next prime is 66141472597. The reversal of 66141472564 is 46527414166.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65418292900 + 723179664 = 255770^2 + 26892^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66141472561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8267684067 + ... + 8267684074.

Almost surely, 2^66141472564 is an apocalyptic number.

It is an amenable number.

66141472564 is a deficient number, since it is larger than the sum of its proper divisors (49606104430).

66141472564 is a wasteful number, since it uses less digits than its factorization.

66141472564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16535368145 (or 16535368143 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The spelling of 66141472564 in words is "sixty-six billion, one hundred forty-one million, four hundred seventy-two thousand, five hundred sixty-four".