67632677261 has 2 divisors, whose sum is σ = 67632677262. Its totient is φ = 67632677260.

The previous prime is 67632677227. The next prime is 67632677279. The reversal of 67632677261 is 16277623676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59545272361 + 8087404900 = 244019^2 + 89930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67632677261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67632676261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33816338630 + 33816338631.

It is an arithmetic number, because the mean of its divisors is an integer number (33816338631).

Almost surely, 2^67632677261 is an apocalyptic number.

It is an amenable number.

67632677261 is a deficient number, since it is larger than the sum of its proper divisors (1).

67632677261 is an equidigital number, since it uses as much as digits as its factorization.

67632677261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 53.

The spelling of 67632677261 in words is "sixty-seven billion, six hundred thirty-two million, six hundred seventy-seven thousand, two hundred sixty-one".