65656616066566 has 48 divisors (see below), whose sum is σ = 119879707812480. Its totient is φ = 26857829093760.

The previous prime is 65656616066527. The next prime is 65656616066609. The reversal of 65656616066566 is 66566061665656.

It is a junction number, because it is equal to n+sod(n) for n = 65656616066495 and 65656616066504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147804181 + ... + 148247728.

It is an arithmetic number, because the mean of its divisors is an integer number (2497493912760).

Almost surely, 2^{65656616066566} is an apocalyptic number.

65656616066566 is a deficient number, since it is larger than the sum of its proper divisors (54223091745914).

65656616066566 is a wasteful number, since it uses less digits than its factorization.

65656616066566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296052029 (or 296052022 counting only the distinct ones).

The product of its (nonzero) digits is 1259712000, while the sum is 70.

The spelling of 65656616066566 in words is "sixty-five trillion, six hundred fifty-six billion, six hundred sixteen million, sixty-six thousand, five hundred sixty-six".