67707817993 has 4 divisors (see below), whose sum is σ = 67713242368. Its totient is φ = 67702393620.

The previous prime is 67707817981. The next prime is 67707818039. The reversal of 67707817993 is 39971870776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67707817993 - 2¹³ = 67707809801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67707887993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2693421 + ... + 2718442.

It is an arithmetic number, because the mean of its divisors is an integer number (16928310592).

Almost surely, 2^67707817993 is an apocalyptic number.

It is an amenable number.

67707817993 is a deficient number, since it is larger than the sum of its proper divisors (5424375).

67707817993 is a wasteful number, since it uses less digits than its factorization.

67707817993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424374.

The product of its (nonzero) digits is 28005264, while the sum is 64.

The spelling of 67707817993 in words is "sixty-seven billion, seven hundred seven million, eight hundred seventeen thousand, nine hundred ninety-three".