67611700711661 has 2 divisors, whose sum is σ = 67611700711662. Its totient is φ = 67611700711660.

The previous prime is 67611700711637. The next prime is 67611700711729. The reversal of 67611700711661 is 16611700711676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52651437089161 + 14960263622500 = 7256131^2 + 3867850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67611700711661 is a prime.

It is a super-2 number, since 2×67611700711661² (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 (67611780711661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33805850355830 + 33805850355831.

It is an arithmetic number, because the mean of its divisors is an integer number (33805850355831).

Almost surely, 2^{67611700711661} is an apocalyptic number.

It is an amenable number.

67611700711661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67611700711661 is an equidigital number, since it uses as much as digits as its factorization.

67611700711661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 50.

The spelling of 67611700711661 in words is "sixty-seven trillion, six hundred eleven billion, seven hundred million, seven hundred eleven thousand, six hundred sixty-one".