65366678067 has 4 divisors (see below), whose sum is σ = 87155570760. Its totient is φ = 43577785376.

The previous prime is 65366678021. The next prime is 65366678093. The reversal of 65366678067 is 76087666356.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65366678067 - 2¹⁹ = 65366153779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65366678067.

It is not an unprimeable number, because it can be changed into a prime (65366678467) 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, 10894446342 + ... + 10894446347.

It is an arithmetic number, because the mean of its divisors is an integer number (21788892690).

Almost surely, 2^65366678067 is an apocalyptic number.

65366678067 is a deficient number, since it is larger than the sum of its proper divisors (21788892693).

65366678067 is a wasteful number, since it uses less digits than its factorization.

65366678067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21788892692.

The product of its (nonzero) digits is 45722880, while the sum is 60.

The spelling of 65366678067 in words is "sixty-five billion, three hundred sixty-six million, six hundred seventy-eight thousand, sixty-seven".