65135345556566 has 16 divisors (see below), whose sum is σ = 97732698428880. Its totient is φ = 32557779963360.

The previous prime is 65135345556557. The next prime is 65135345556629. The reversal of 65135345556566 is 66565554353156.

It is a happy number.

It is a super-2 number, since 2×65135345556566² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 279409136 + ... + 279642156.

It is an arithmetic number, because the mean of its divisors is an integer number (6108293651805).

Almost surely, 2^{65135345556566} is an apocalyptic number.

65135345556566 is a deficient number, since it is larger than the sum of its proper divisors (32597352872314).

65135345556566 is a wasteful number, since it uses less digits than its factorization.

65135345556566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274879.

The product of its digits is 729000000, while the sum is 65.

The spelling of 65135345556566 in words is "sixty-five trillion, one hundred thirty-five billion, three hundred forty-five million, five hundred fifty-six thousand, five hundred sixty-six".