67553321377 has 2 divisors, whose sum is σ = 67553321378. Its totient is φ = 67553321376.

The previous prime is 67553321371. The next prime is 67553321393. The reversal of 67553321377 is 77312335576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60062245776 + 7491075601 = 245076^2 + 86551^2 .

It is a cyclic number.

It is not a de Polignac number, because 67553321377 - 2¹¹ = 67553319329 is a prime.

It is a super-2 number, since 2×67553321377² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67553321377.

It is not a weakly prime, because it can be changed into another prime (67553321371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33776660688 + 33776660689.

It is an arithmetic number, because the mean of its divisors is an integer number (33776660689).

Almost surely, 2^67553321377 is an apocalyptic number.

It is an amenable number.

67553321377 is a deficient number, since it is larger than the sum of its proper divisors (1).

67553321377 is an equidigital number, since it uses as much as digits as its factorization.

67553321377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2778300, while the sum is 49.

The spelling of 67553321377 in words is "sixty-seven billion, five hundred fifty-three million, three hundred twenty-one thousand, three hundred seventy-seven".