67642474553 has 2 divisors, whose sum is σ = 67642474554. Its totient is φ = 67642474552.

The previous prime is 67642474507. The next prime is 67642474561. The reversal of 67642474553 is 35547424676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40508807824 + 27133666729 = 201268^2 + 164723^2 .

It is a cyclic number.

It is not a de Polignac number, because 67642474553 - 2²⁰ = 67641425977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67642474495 and 67642474504.

It is not a weakly prime, because it can be changed into another prime (67642474453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33821237276 + 33821237277.

It is an arithmetic number, because the mean of its divisors is an integer number (33821237277).

Almost surely, 2^67642474553 is an apocalyptic number.

It is an amenable number.

67642474553 is a deficient number, since it is larger than the sum of its proper divisors (1).

67642474553 is an equidigital number, since it uses as much as digits as its factorization.

67642474553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16934400, while the sum is 53.

The spelling of 67642474553 in words is "sixty-seven billion, six hundred forty-two million, four hundred seventy-four thousand, five hundred fifty-three".