66105701 has 2 divisors, whose sum is σ = 66105702. Its totient is φ = 66105700.

The previous prime is 66105691. The next prime is 66105713. The reversal of 66105701 is 10750166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 6120676 = 7745^2 + 2474^2 .

It is a cyclic number.

It is not a de Polignac number, because 66105701 - 2¹⁰ = 66104677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052850 + 33052851.

It is an arithmetic number, because the mean of its divisors is an integer number (33052851).

Almost surely, 2^66105701 is an apocalyptic number.

It is an amenable number.

66105701 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105701 is an equidigital number, since it uses as much as digits as its factorization.

66105701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 66105701 is about 8130.5412488960. The cubic root of 66105701 is about 404.3396259389.

Adding to 66105701 its reverse (10750166), we get a palindrome (76855867).

The spelling of 66105701 in words is "sixty-six million, one hundred five thousand, seven hundred one".