166431035262013 has 4 divisors (see below), whose sum is σ = 166437732443328. Its totient is φ = 166424338080700.

The previous prime is 166431035261867. The next prime is 166431035262017. The reversal of 166431035262013 is 310262530134661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166431035262013 - 2²¹ = 166431033164861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166431035262017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3348553381 + ... + 3348603082.

It is an arithmetic number, because the mean of its divisors is an integer number (41609433110832).

Almost surely, 2^{166431035262013} is an apocalyptic number.

It is an amenable number.

166431035262013 is a deficient number, since it is larger than the sum of its proper divisors (6697181315).

166431035262013 is an equidigital number, since it uses as much as digits as its factorization.

166431035262013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6697181314.

The product of its (nonzero) digits is 466560, while the sum is 43.

Adding to 166431035262013 its reverse (310262530134661), we get a palindrome (476693565396674).

The spelling of 166431035262013 in words is "one hundred sixty-six trillion, four hundred thirty-one billion, thirty-five million, two hundred sixty-two thousand, thirteen".