16660400571 has 32 divisors (see below), whose sum is σ = 26243481600. Its totient is φ = 10409777280.

The previous prime is 16660400569. The next prime is 16660400651. The reversal of 16660400571 is 17500406661.

16660400571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16660400571 - 2¹ = 16660400569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16660420571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33766 + ... + 185636.

It is an arithmetic number, because the mean of its divisors is an integer number (820108800).

Almost surely, 2^16660400571 is an apocalyptic number.

16660400571 is a deficient number, since it is larger than the sum of its proper divisors (9583081029).

16660400571 is a wasteful number, since it uses less digits than its factorization.

16660400571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152136 (or 152130 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 16660400571 in words is "sixteen billion, six hundred sixty million, four hundred thousand, five hundred seventy-one".