166748401 has 2 divisors, whose sum is σ = 166748402. Its totient is φ = 166748400.

The previous prime is 166748383. The next prime is 166748419. The reversal of 166748401 is 104847661.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (166748383) and next prime (166748419).

It can be written as a sum of positive squares in only one way, i.e., 147379600 + 19368801 = 12140^2 + 4401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166748401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166748501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83374200 + 83374201.

It is an arithmetic number, because the mean of its divisors is an integer number (83374201).

Almost surely, 2^166748401 is an apocalyptic number.

It is an amenable number.

166748401 is a deficient number, since it is larger than the sum of its proper divisors (1).

166748401 is an equidigital number, since it uses as much as digits as its factorization.

166748401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 166748401 is about 12913.1096564693. The cubic root of 166748401 is about 550.4111537216.

The spelling of 166748401 in words is "one hundred sixty-six million, seven hundred forty-eight thousand, four hundred one".