166744822337 has 8 divisors (see below), whose sum is σ = 176563072296. Its totient is φ = 156927653632.

The previous prime is 166744822333. The next prime is 166744822357. The reversal of 166744822337 is 733228447661.

It is a happy number.

It is a Cunningham number, because it is equal to 408344²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 129818972416 + 36925849921 = 360304^2 + 192161^2 .

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 166744822337 - 2² = 166744822333 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166744822333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58643 + ... + 580455.

It is an arithmetic number, because the mean of its divisors is an integer number (22070384037).

Almost surely, 2^166744822337 is an apocalyptic number.

166744822337 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

166744822337 is a deficient number, since it is larger than the sum of its proper divisors (9818249959).

166744822337 is a wasteful number, since it uses less digits than its factorization.

166744822337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540627.

The product of its digits is 8128512, while the sum is 53.

The spelling of 166744822337 in words is "one hundred sixty-six billion, seven hundred forty-four million, eight hundred twenty-two thousand, three hundred thirty-seven".