166441275479 has 4 divisors (see below), whose sum is σ = 166442123376. Its totient is φ = 166440427584.

The previous prime is 166441275467. The next prime is 166441275509. The reversal of 166441275479 is 974572144661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 974572144661 = 711817 ⋅1369133.

It is a cyclic number.

It is not a de Polignac number, because 166441275479 - 2⁴ = 166441275463 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 (166441275409) 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, 39047 + ... + 578279.

It is an arithmetic number, because the mean of its divisors is an integer number (41610530844).

Almost surely, 2^166441275479 is an apocalyptic number.

166441275479 is a deficient number, since it is larger than the sum of its proper divisors (847897).

166441275479 is an equidigital number, since it uses as much as digits as its factorization.

166441275479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847896.

The product of its digits is 10160640, while the sum is 56.

The spelling of 166441275479 in words is "one hundred sixty-six billion, four hundred forty-one million, two hundred seventy-five thousand, four hundred seventy-nine".