66575101 has 2 divisors, whose sum is σ = 66575102. Its totient is φ = 66575100.

The previous prime is 66575081. The next prime is 66575143. The reversal of 66575101 is 10157566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33524100 + 33051001 = 5790^2 + 5749^2 .

It is a cyclic number.

It is not a de Polignac number, because 66575101 - 2¹³ = 66566909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66575161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33287550 + 33287551.

It is an arithmetic number, because the mean of its divisors is an integer number (33287551).

Almost surely, 2^66575101 is an apocalyptic number.

It is an amenable number.

66575101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66575101 is an equidigital number, since it uses as much as digits as its factorization.

66575101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 66575101 is about 8159.3566535604. The cubic root of 66575101 is about 405.2944076884.

The spelling of 66575101 in words is "sixty-six million, five hundred seventy-five thousand, one hundred one".