166421112324511 has 12 divisors (see below), whose sum is σ = 182926506994056. Its totient is φ = 151291240820720.

The previous prime is 166421112324463. The next prime is 166421112324539. The reversal of 166421112324511 is 115423211124661.

It is not a de Polignac number, because 166421112324511 - 2³⁹ = 165871356510623 is a prime.

It is a super-3 number, since 3×166421112324511³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166421112324611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25017225 + ... + 30962941.

It is an arithmetic number, because the mean of its divisors is an integer number (15243875582838).

Almost surely, 2^{166421112324511} is an apocalyptic number.

166421112324511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166421112324511 is a deficient number, since it is larger than the sum of its proper divisors (16505394669545).

166421112324511 is a wasteful number, since it uses less digits than its factorization.

166421112324511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177062 (or 6177051 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The spelling of 166421112324511 in words is "one hundred sixty-six trillion, four hundred twenty-one billion, one hundred twelve million, three hundred twenty-four thousand, five hundred eleven".