67148669148661 has 2 divisors, whose sum is σ = 67148669148662. Its totient is φ = 67148669148660.

The previous prime is 67148669148653. The next prime is 67148669148667. The reversal of 67148669148661 is 16684196684176.

67148669148661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60082806716100 + 7065862432561 = 7751310^2 + 2658169^2 .

It is a cyclic number.

It is not a de Polignac number, because 67148669148661 - 2³ = 67148669148653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67148669148667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33574334574330 + 33574334574331.

It is an arithmetic number, because the mean of its divisors is an integer number (33574334574331).

Almost surely, 2^{67148669148661} is an apocalyptic number.

It is an amenable number.

67148669148661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67148669148661 is an equidigital number, since it uses as much as digits as its factorization.

67148669148661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 501645312, while the sum is 73.

The spelling of 67148669148661 in words is "sixty-seven trillion, one hundred forty-eight billion, six hundred sixty-nine million, one hundred forty-eight thousand, six hundred sixty-one".