67277778889 has 4 divisors (see below), whose sum is σ = 70818714640. Its totient is φ = 63736843140.

The previous prime is 67277778881. The next prime is 67277778941. The reversal of 67277778889 is 98887777276.

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 67277778889 - 2³ = 67277778881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67277778881) 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, 1770467847 + ... + 1770467884.

It is an arithmetic number, because the mean of its divisors is an integer number (17704678660).

Almost surely, 2^67277778889 is an apocalyptic number.

It is an amenable number.

67277778889 is a deficient number, since it is larger than the sum of its proper divisors (3540935751).

67277778889 is a wasteful number, since it uses less digits than its factorization.

67277778889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540935750.

The product of its digits is 929359872, while the sum is 76.

The spelling of 67277778889 in words is "sixty-seven billion, two hundred seventy-seven million, seven hundred seventy-eight thousand, eight hundred eighty-nine".