67615665687901 has 2 divisors, whose sum is σ = 67615665687902. Its totient is φ = 67615665687900.

The previous prime is 67615665687883. The next prime is 67615665687917. The reversal of 67615665687901 is 10978656651676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57472243292025 + 10143422395876 = 7581045^2 + 3184874^2 .

It is a cyclic number.

It is not a de Polignac number, because 67615665687901 - 2¹¹ = 67615665685853 is a prime.

It is a super-2 number, since 2×67615665687901² (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 (67615665687601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33807832843950 + 33807832843951.

It is an arithmetic number, because the mean of its divisors is an integer number (33807832843951).

Almost surely, 2^{67615665687901} is an apocalyptic number.

It is an amenable number.

67615665687901 is a deficient number, since it is larger than the sum of its proper divisors (1).

67615665687901 is an equidigital number, since it uses as much as digits as its factorization.

67615665687901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 685843200, while the sum is 73.

The spelling of 67615665687901 in words is "sixty-seven trillion, six hundred fifteen billion, six hundred sixty-five million, six hundred eighty-seven thousand, nine hundred one".