67668522586661 has 2 divisors, whose sum is σ = 67668522586662. Its totient is φ = 67668522586660.

The previous prime is 67668522586633. The next prime is 67668522586741. The reversal of 67668522586661 is 16668522586676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66173441706436 + 1495080880225 = 8134706^2 + 1222735^2 .

It is a cyclic number.

It is not a de Polignac number, because 67668522586661 - 2¹⁸ = 67668522324517 is a prime.

It is a super-2 number, since 2×67668522586661² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67668522586961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33834261293330 + 33834261293331.

It is an arithmetic number, because the mean of its divisors is an integer number (33834261293331).

Almost surely, 2^{67668522586661} is an apocalyptic number.

It is an amenable number.

67668522586661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67668522586661 is an equidigital number, since it uses as much as digits as its factorization.

67668522586661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2090188800, while the sum is 74.

The spelling of 67668522586661 in words is "sixty-seven trillion, six hundred sixty-eight billion, five hundred twenty-two million, five hundred eighty-six thousand, six hundred sixty-one".