67165564993 has 2 divisors, whose sum is σ = 67165564994. Its totient is φ = 67165564992.

The previous prime is 67165564987. The next prime is 67165564997. The reversal of 67165564993 is 39946556176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66888442384 + 277122609 = 258628^2 + 16647^2 .

It is a cyclic number.

It is not a de Polignac number, because 67165564993 - 2⁹ = 67165564481 is a prime.

It is a super-2 number, since 2×67165564993² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67165564997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33582782496 + 33582782497.

It is an arithmetic number, because the mean of its divisors is an integer number (33582782497).

Almost surely, 2^67165564993 is an apocalyptic number.

It is an amenable number.

67165564993 is a deficient number, since it is larger than the sum of its proper divisors (1).

67165564993 is an equidigital number, since it uses as much as digits as its factorization.

67165564993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 61.

The spelling of 67165564993 in words is "sixty-seven billion, one hundred sixty-five million, five hundred sixty-four thousand, nine hundred ninety-three".