166441343523425 has 12 divisors (see below), whose sum is σ = 207243644673516. Its totient is φ = 132600572428800.

The previous prime is 166441343523401. The next prime is 166441343523431. The reversal of 166441343523425 is 524325343144661.

It can be written as a sum of positive squares in 6 ways, for example, as 9881164738624 + 156560178784801 = 3143432^2 + 12512401^2 .

It is not a de Polignac number, because 166441343523425 - 2²² = 166441339329121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 13812553604 + ... + 13812565653.

It is an arithmetic number, because the mean of its divisors is an integer number (17270303722793).

Almost surely, 2^{166441343523425} is an apocalyptic number.

It is an amenable number.

166441343523425 is a deficient number, since it is larger than the sum of its proper divisors (40802301150091).

166441343523425 is a wasteful number, since it uses less digits than its factorization.

166441343523425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27625119508 (or 27625119503 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 53.

The spelling of 166441343523425 in words is "one hundred sixty-six trillion, four hundred forty-one billion, three hundred forty-three million, five hundred twenty-three thousand, four hundred twenty-five".