67060505621 has 2 divisors, whose sum is σ = 67060505622. Its totient is φ = 67060505620.

The previous prime is 67060505609. The next prime is 67060505669. The reversal of 67060505621 is 12650506076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35220028900 + 31840476721 = 187670^2 + 178439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67060505621 is a prime.

It is a super-2 number, since 2×67060505621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67060505921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33530252810 + 33530252811.

It is an arithmetic number, because the mean of its divisors is an integer number (33530252811).

Almost surely, 2^67060505621 is an apocalyptic number.

It is an amenable number.

67060505621 is a deficient number, since it is larger than the sum of its proper divisors (1).

67060505621 is an equidigital number, since it uses as much as digits as its factorization.

67060505621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 67060505621 in words is "sixty-seven billion, sixty million, five hundred five thousand, six hundred twenty-one".