65611125506 has 16 divisors (see below), whose sum is σ = 99212553216. Its totient is φ = 32540987856.

The previous prime is 65611125499. The next prime is 65611125529. The reversal of 65611125506 is 60552111656.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65611125506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6335 + ... + 362301.

It is an arithmetic number, because the mean of its divisors is an integer number (6200784576).

Almost surely, 2^65611125506 is an apocalyptic number.

65611125506 is a deficient number, since it is larger than the sum of its proper divisors (33601427710).

65611125506 is a wasteful number, since it uses less digits than its factorization.

65611125506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356713.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 65611125506 in words is "sixty-five billion, six hundred eleven million, one hundred twenty-five thousand, five hundred six".