67607205121 has 4 divisors (see below), whose sum is σ = 68616267952. Its totient is φ = 66598142292.

The previous prime is 67607205109. The next prime is 67607205151. The reversal of 67607205121 is 12150270676.

67607205121 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-67607205121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67607205151) 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, 504531315 + ... + 504531448.

It is an arithmetic number, because the mean of its divisors is an integer number (17154066988).

Almost surely, 2^67607205121 is an apocalyptic number.

It is an amenable number.

67607205121 is a deficient number, since it is larger than the sum of its proper divisors (1009062831).

67607205121 is a wasteful number, since it uses less digits than its factorization.

67607205121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009062830.

The product of its (nonzero) digits is 35280, while the sum is 37.

Adding to 67607205121 its reverse (12150270676), we get a palindrome (79757475797).

The spelling of 67607205121 in words is "sixty-seven billion, six hundred seven million, two hundred five thousand, one hundred twenty-one".