12571804666 has 16 divisors (see below), whose sum is σ = 19475359488. Its totient is φ = 6080212800.

The previous prime is 12571804649. The next prime is 12571804667. The reversal of 12571804666 is 66640817521.

It is not an unprimeable number, because it can be changed into a prime (12571804667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84546 + ... + 179698.

It is an arithmetic number, because the mean of its divisors is an integer number (1217209968).

Almost surely, 2^12571804666 is an apocalyptic number.

12571804666 is a deficient number, since it is larger than the sum of its proper divisors (6903554822).

12571804666 is a wasteful number, since it uses less digits than its factorization.

12571804666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97317.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 12571804666 in words is "twelve billion, five hundred seventy-one million, eight hundred four thousand, six hundred sixty-six".