66953101 has 2 divisors, whose sum is σ = 66953102. Its totient is φ = 66953100.

The previous prime is 66953077. The next prime is 66953143. The reversal of 66953101 is 10135966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63441225 + 3511876 = 7965^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 66953101 - 2⁷ = 66952973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66953171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33476550 + 33476551.

It is an arithmetic number, because the mean of its divisors is an integer number (33476551).

Almost surely, 2^66953101 is an apocalyptic number.

It is an amenable number.

66953101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66953101 is an equidigital number, since it uses as much as digits as its factorization.

66953101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 66953101 is about 8182.4874579800. The cubic root of 66953101 is about 406.0600204890.

The spelling of 66953101 in words is "sixty-six million, nine hundred fifty-three thousand, one hundred one".