67680707677 has 4 divisors (see below), whose sum is σ = 73833499296. Its totient is φ = 61527916060.

The previous prime is 67680707663. The next prime is 67680707681. The reversal of 67680707677 is 77670708676.

67680707677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-67680707677 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 (67680707687) 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, 3076395793 + ... + 3076395814.

It is an arithmetic number, because the mean of its divisors is an integer number (18458374824).

Almost surely, 2^67680707677 is an apocalyptic number.

It is an amenable number.

67680707677 is a deficient number, since it is larger than the sum of its proper divisors (6152791619).

67680707677 is a wasteful number, since it uses less digits than its factorization.

67680707677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152791618.

The product of its (nonzero) digits is 29042496, while the sum is 61.

Subtracting 67680707677 from its reverse (77670708676), we obtain a palindrome (9990000999).

The spelling of 67680707677 in words is "sixty-seven billion, six hundred eighty million, seven hundred seven thousand, six hundred seventy-seven".