166540006243004 has 24 divisors (see below), whose sum is σ = 291707777288928. Its totient is φ = 83194937948160.

The previous prime is 166540006242983. The next prime is 166540006243033. The reversal of 166540006243004 is 400342600045661.

It is a super-2 number, since 2×166540006243004² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59894624 + ... + 62613464.

It is an arithmetic number, because the mean of its divisors is an integer number (12154490720372).

Almost surely, 2^{166540006243004} is an apocalyptic number.

It is an amenable number.

166540006243004 is a deficient number, since it is larger than the sum of its proper divisors (125167771045924).

166540006243004 is a wasteful number, since it uses less digits than its factorization.

166540006243004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732645 (or 2732643 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 166540006243004 its reverse (400342600045661), we get a palindrome (566882606288665).

The spelling of 166540006243004 in words is "one hundred sixty-six trillion, five hundred forty billion, six million, two hundred forty-three thousand, four".