67645734901 has 2 divisors, whose sum is σ = 67645734902. Its totient is φ = 67645734900.

The previous prime is 67645734899. The next prime is 67645734917. The reversal of 67645734901 is 10943754676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55036690801 + 12609044100 = 234599^2 + 112290^2 .

It is a cyclic number.

It is not a de Polignac number, because 67645734901 - 2¹ = 67645734899 is a prime.

Together with 67645734899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67645734001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33822867450 + 33822867451.

It is an arithmetic number, because the mean of its divisors is an integer number (33822867451).

Almost surely, 2^67645734901 is an apocalyptic number.

It is an amenable number.

67645734901 is a deficient number, since it is larger than the sum of its proper divisors (1).

67645734901 is an equidigital number, since it uses as much as digits as its factorization.

67645734901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 67645734901 in words is "sixty-seven billion, six hundred forty-five million, seven hundred thirty-four thousand, nine hundred one".