166622002993 has 8 divisors (see below), whose sum is σ = 168883331400. Its totient is φ = 164369323008.

The previous prime is 166622002991. The next prime is 166622003021. The reversal of 166622002993 is 399200226661.

It can be written as a sum of positive squares in 4 ways, for example, as 11095883569 + 155526119424 = 105337^2 + 394368^2 .

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 166622002993 - 2¹ = 166622002991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166622002991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123308 + ... + 2200381.

It is an arithmetic number, because the mean of its divisors is an integer number (21110416425).

Almost surely, 2^166622002993 is an apocalyptic number.

It is an amenable number.

166622002993 is a deficient number, since it is larger than the sum of its proper divisors (2261328407).

166622002993 is an equidigital number, since it uses as much as digits as its factorization.

166622002993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324211.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 166622002993 in words is "one hundred sixty-six billion, six hundred twenty-two million, two thousand, nine hundred ninety-three".