166054513 has 2 divisors, whose sum is σ = 166054514. Its totient is φ = 166054512.

The previous prime is 166054489. The next prime is 166054579. The reversal of 166054513 is 315450661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104714289 + 61340224 = 10233^2 + 7832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166054513 is a prime.

It is not a weakly prime, because it can be changed into another prime (166054583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83027256 + 83027257.

It is an arithmetic number, because the mean of its divisors is an integer number (83027257).

Almost surely, 2^166054513 is an apocalyptic number.

It is an amenable number.

166054513 is a deficient number, since it is larger than the sum of its proper divisors (1).

166054513 is an equidigital number, since it uses as much as digits as its factorization.

166054513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 166054513 is about 12886.2140677547. The cubic root of 166054513 is about 549.6466192788.

The spelling of 166054513 in words is "one hundred sixty-six million, fifty-four thousand, five hundred thirteen".