65967786940553 has 16 divisors (see below), whose sum is σ = 67267819084032. Its totient is φ = 64674962880000.

The previous prime is 65967786940543. The next prime is 65967786940571. The reversal of 65967786940553 is 35504968776956.

It is a cyclic number.

It is not a de Polignac number, because 65967786940553 - 2⁴⁰ = 64868275312777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65967786940513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49972538 + ... + 51275628.

It is an arithmetic number, because the mean of its divisors is an integer number (4204238692752).

Almost surely, 2^{65967786940553} is an apocalyptic number.

It is an amenable number.

65967786940553 is a deficient number, since it is larger than the sum of its proper divisors (1300032143479).

65967786940553 is a wasteful number, since it uses less digits than its factorization.

65967786940553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305856.

The product of its (nonzero) digits is 10287648000, while the sum is 80.

The spelling of 65967786940553 in words is "sixty-five trillion, nine hundred sixty-seven billion, seven hundred eighty-six million, nine hundred forty thousand, five hundred fifty-three".