166628701 has 2 divisors, whose sum is σ = 166628702. Its totient is φ = 166628700.

The previous prime is 166628681. The next prime is 166628711. The reversal of 166628701 is 107826661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101002500 + 65626201 = 10050^2 + 8101^2 .

It is an emirp because it is prime and its reverse (107826661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166628701 - 2¹¹ = 166626653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166628711) 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 as a sum of consecutive naturals, namely, 83314350 + 83314351.

It is an arithmetic number, because the mean of its divisors is an integer number (83314351).

Almost surely, 2^166628701 is an apocalyptic number.

It is an amenable number.

166628701 is a deficient number, since it is larger than the sum of its proper divisors (1).

166628701 is an equidigital number, since it uses as much as digits as its factorization.

166628701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 166628701 is about 12908.4739996639. The cubic root of 166628701 is about 550.2794183527.

The spelling of 166628701 in words is "one hundred sixty-six million, six hundred twenty-eight thousand, seven hundred one".