166320024641 has 4 divisors (see below), whose sum is σ = 169046582484. Its totient is φ = 163593466800.

The previous prime is 166320024631. The next prime is 166320024691. The reversal of 166320024641 is 146420023661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37202694400 + 129117330241 = 192880^2 + 359329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166320024641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166320024601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363278830 + ... + 1363278951.

It is an arithmetic number, because the mean of its divisors is an integer number (42261645621).

Almost surely, 2^166320024641 is an apocalyptic number.

It is an amenable number.

166320024641 is a deficient number, since it is larger than the sum of its proper divisors (2726557843).

166320024641 is an equidigital number, since it uses as much as digits as its factorization.

166320024641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726557842.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 166320024641 in words is "one hundred sixty-six billion, three hundred twenty million, twenty-four thousand, six hundred forty-one".