67079297077 has 4 divisors (see below), whose sum is σ = 72239243020. Its totient is φ = 61919351136.

The previous prime is 67079297059. The next prime is 67079297111. The reversal of 67079297077 is 77079297076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34074944836 + 33004352241 = 184594^2 + 181671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67079297077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67079297377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579972952 + ... + 2579972977.

It is an arithmetic number, because the mean of its divisors is an integer number (18059810755).

Almost surely, 2^67079297077 is an apocalyptic number.

It is an amenable number.

67079297077 is a deficient number, since it is larger than the sum of its proper divisors (5159945943).

67079297077 is a wasteful number, since it uses less digits than its factorization.

67079297077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159945942.

The product of its (nonzero) digits is 16336404, while the sum is 61.

Subtracting 67079297077 from its reverse (77079297076), we obtain a palindrome (9999999999).

The spelling of 67079297077 in words is "sixty-seven billion, seventy-nine million, two hundred ninety-seven thousand, seventy-seven".