166241971493 has 8 divisors (see below), whose sum is σ = 188452437600. Its totient is φ = 145377594288.

The previous prime is 166241971459. The next prime is 166241971541. The reversal of 166241971493 is 394179142661.

It is a happy number.

166241971493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166241971493 - 2¹⁰ = 166241970469 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 (166241971403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336521963 + ... + 336522456.

It is an arithmetic number, because the mean of its divisors is an integer number (23556554700).

Almost surely, 2^166241971493 is an apocalyptic number.

166241971493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166241971493 is a deficient number, since it is larger than the sum of its proper divisors (22210466107).

166241971493 is a wasteful number, since it uses less digits than its factorization.

166241971493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673044451.

The product of its digits is 1959552, while the sum is 53.

The spelling of 166241971493 in words is "one hundred sixty-six billion, two hundred forty-one million, nine hundred seventy-one thousand, four hundred ninety-three".