65678833887656 has 32 divisors (see below), whose sum is σ = 135852542020800. Its totient is φ = 29518577024640.

The previous prime is 65678833887643. The next prime is 65678833887677.

It is a happy number.

65678833887656 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (86) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4192971860 + ... + 4192987523.

It is an arithmetic number, because the mean of its divisors is an integer number (4245391938150).

Almost surely, 2^{65678833887656} is an apocalyptic number.

It is an amenable number.

65678833887656 is an abundant number, since it is smaller than the sum of its proper divisors (70173708133144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65678833887656 is a wasteful number, since it uses less digits than its factorization.

65678833887656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8385959489 (or 8385959485 counting only the distinct ones).

The product of its digits is 58525286400, while the sum is 86.

The spelling of 65678833887656 in words is "sixty-five trillion, six hundred seventy-eight billion, eight hundred thirty-three million, eight hundred eighty-seven thousand, six hundred fifty-six".