66170101 has 2 divisors, whose sum is σ = 66170102. Its totient is φ = 66170100.

The previous prime is 66170081. The next prime is 66170107. The reversal of 66170101 is 10107166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 19589476 = 6825^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 66170101 - 2⁷ = 66169973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66170107) 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, 33085050 + 33085051.

It is an arithmetic number, because the mean of its divisors is an integer number (33085051).

Almost surely, 2^66170101 is an apocalyptic number.

It is an amenable number.

66170101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66170101 is an equidigital number, since it uses as much as digits as its factorization.

66170101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 66170101 is about 8134.5006607658. The cubic root of 66170101 is about 404.4708855238.

Adding to 66170101 its reverse (10107166), we get a palindrome (76277267).

The spelling of 66170101 in words is "sixty-six million, one hundred seventy thousand, one hundred one".