66571403241 has 32 divisors (see below), whose sum is σ = 105390754560. Its totient is φ = 36571336704.

The previous prime is 66571403231. The next prime is 66571403243. The reversal of 66571403241 is 14230417566.

It is a happy number.

It is not a de Polignac number, because 66571403241 - 2⁶ = 66571403177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66571403241.

It is not an unprimeable number, because it can be changed into a prime (66571403243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92680 + ... + 376473.

It is an arithmetic number, because the mean of its divisors is an integer number (3293461080).

Almost surely, 2^66571403241 is an apocalyptic number.

It is an amenable number.

66571403241 is a deficient number, since it is larger than the sum of its proper divisors (38819351319).

66571403241 is a wasteful number, since it uses less digits than its factorization.

66571403241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469425.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 66571403241 in words is "sixty-six billion, five hundred seventy-one million, four hundred three thousand, two hundred forty-one".