66560101 has 2 divisors, whose sum is σ = 66560102. Its totient is φ = 66560100.

The previous prime is 66560071. The next prime is 66560119. The reversal of 66560101 is 10106566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50552100 + 16008001 = 7110^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 66560101 - 2⁷ = 66559973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66560141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33280050 + 33280051.

It is an arithmetic number, because the mean of its divisors is an integer number (33280051).

Almost surely, 2^66560101 is an apocalyptic number.

It is an amenable number.

66560101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66560101 is an equidigital number, since it uses as much as digits as its factorization.

66560101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 66560101 is about 8158.4374116616. The cubic root of 66560101 is about 405.2639665141.

Adding to 66560101 its reverse (10106566), we get a palindrome (76666667).

The spelling of 66560101 in words is "sixty-six million, five hundred sixty thousand, one hundred one".