166299277345 has 8 divisors (see below), whose sum is σ = 199884681576. Its totient is φ = 132822389376.

The previous prime is 166299277343. The next prime is 166299277379. The reversal of 166299277345 is 543772992661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23684286609 + 142614990736 = 153897^2 + 377644^2 .

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 166299277345 - 2¹ = 166299277343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166299277343) 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, 27125692 + ... + 27131821.

It is an arithmetic number, because the mean of its divisors is an integer number (24985585197).

Almost surely, 2^166299277345 is an apocalyptic number.

It is an amenable number.

166299277345 is a deficient number, since it is larger than the sum of its proper divisors (33585404231).

166299277345 is an equidigital number, since it uses as much as digits as its factorization.

166299277345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54258131.

The product of its digits is 34292160, while the sum is 61.

The spelling of 166299277345 in words is "one hundred sixty-six billion, two hundred ninety-nine million, two hundred seventy-seven thousand, three hundred forty-five".