166878541237413 has 4 divisors (see below), whose sum is σ = 222504721649888. Its totient is φ = 111252360824940.

The previous prime is 166878541237393. The next prime is 166878541237417. The reversal of 166878541237413 is 314732145878661.

166878541237413 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 166878541237413 - 2¹⁶ = 166878541171877 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 (166878541237417) 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, 27813090206233 + ... + 27813090206238.

It is an arithmetic number, because the mean of its divisors is an integer number (55626180412472).

Almost surely, 2^{166878541237413} is an apocalyptic number.

It is an amenable number.

166878541237413 is a deficient number, since it is larger than the sum of its proper divisors (55626180412475).

166878541237413 is an equidigital number, since it uses as much as digits as its factorization.

166878541237413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55626180412474.

The product of its digits is 162570240, while the sum is 66.

The spelling of 166878541237413 in words is "one hundred sixty-six trillion, eight hundred seventy-eight billion, five hundred forty-one million, two hundred thirty-seven thousand, four hundred thirteen".