166133413 has 2 divisors, whose sum is σ = 166133414. Its totient is φ = 166133412.

The previous prime is 166133411. The next prime is 166133419. The reversal of 166133413 is 314331661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165945924 + 187489 = 12882^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 166133413 - 2¹ = 166133411 is a prime.

Together with 166133411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166133411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83066706 + 83066707.

It is an arithmetic number, because the mean of its divisors is an integer number (83066707).

Almost surely, 2^166133413 is an apocalyptic number.

It is an amenable number.

166133413 is a deficient number, since it is larger than the sum of its proper divisors (1).

166133413 is an equidigital number, since it uses as much as digits as its factorization.

166133413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 166133413 is about 12889.2751153818. The cubic root of 166133413 is about 549.7336594737.

The spelling of 166133413 in words is "one hundred sixty-six million, one hundred thirty-three thousand, four hundred thirteen".