166382501 has 2 divisors, whose sum is σ = 166382502. Its totient is φ = 166382500.

The previous prime is 166382497. The next prime is 166382591. The reversal of 166382501 is 105283661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88924900 + 77457601 = 9430^2 + 8801^2 .

It is a cyclic number.

It is not a de Polignac number, because 166382501 - 2² = 166382497 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 (166382591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83191250 + 83191251.

It is an arithmetic number, because the mean of its divisors is an integer number (83191251).

Almost surely, 2^166382501 is an apocalyptic number.

It is an amenable number.

166382501 is a deficient number, since it is larger than the sum of its proper divisors (1).

166382501 is an equidigital number, since it uses as much as digits as its factorization.

166382501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 166382501 is about 12898.9341032505. The cubic root of 166382501 is about 550.0082654405.

The spelling of 166382501 in words is "one hundred sixty-six million, three hundred eighty-two thousand, five hundred one".