67551603397 has 2 divisors, whose sum is σ = 67551603398. Its totient is φ = 67551603396.

The previous prime is 67551603391. The next prime is 67551603419. The reversal of 67551603397 is 79330615576.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39209544196 + 28342059201 = 198014^2 + 168351^2 .

It is a cyclic number.

It is not a de Polignac number, because 67551603397 - 2¹⁵ = 67551570629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67551603391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33775801698 + 33775801699.

It is an arithmetic number, because the mean of its divisors is an integer number (33775801699).

Almost surely, 2^67551603397 is an apocalyptic number.

It is an amenable number.

67551603397 is a deficient number, since it is larger than the sum of its proper divisors (1).

67551603397 is an equidigital number, since it uses as much as digits as its factorization.

67551603397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3572100, while the sum is 52.

The spelling of 67551603397 in words is "sixty-seven billion, five hundred fifty-one million, six hundred three thousand, three hundred ninety-seven".