66112601 has 2 divisors, whose sum is σ = 66112602. Its totient is φ = 66112600.

The previous prime is 66112591. The next prime is 66112621. The reversal of 66112601 is 10621166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37810201 + 28302400 = 6149^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 66112601 - 2⁶ = 66112537 is a prime.

It is not a weakly prime, because it can be changed into another prime (66112621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33056300 + 33056301.

It is an arithmetic number, because the mean of its divisors is an integer number (33056301).

Almost surely, 2^66112601 is an apocalyptic number.

It is an amenable number.

66112601 is a deficient number, since it is larger than the sum of its proper divisors (1).

66112601 is an equidigital number, since it uses as much as digits as its factorization.

66112601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 66112601 is about 8130.9655638184. The cubic root of 66112601 is about 404.3536935423.

Adding to 66112601 its reverse (10621166), we get a palindrome (76733767).

The spelling of 66112601 in words is "sixty-six million, one hundred twelve thousand, six hundred one".