66572613471 has 16 divisors (see below), whose sum is σ = 109247366144. Its totient is φ = 35115224544.

The previous prime is 66572613463. The next prime is 66572613493. The reversal of 66572613471 is 17431627566.

It is a happy number.

It is not a de Polignac number, because 66572613471 - 2³ = 66572613463 is a prime.

It is a super-3 number, since 3×66572613471³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66572613471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572613431) 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, 121927591 + ... + 121928136.

It is an arithmetic number, because the mean of its divisors is an integer number (6827960384).

Almost surely, 2^66572613471 is an apocalyptic number.

66572613471 is a deficient number, since it is larger than the sum of its proper divisors (42674752673).

66572613471 is a wasteful number, since it uses less digits than its factorization.

66572613471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243855750.

The product of its digits is 1270080, while the sum is 48.

The spelling of 66572613471 in words is "sixty-six billion, five hundred seventy-two million, six hundred thirteen thousand, four hundred seventy-one".