65656621307 has 16 divisors (see below), whose sum is σ = 69425137152. Its totient is φ = 61969765440.

The previous prime is 65656621297. The next prime is 65656621309. The reversal of 65656621307 is 70312665656.

It is a cyclic number.

It is not a de Polignac number, because 65656621307 - 2⁴ = 65656621291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65656621309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463832 + ... + 588602.

It is an arithmetic number, because the mean of its divisors is an integer number (4339071072).

Almost surely, 2^65656621307 is an apocalyptic number.

65656621307 is a deficient number, since it is larger than the sum of its proper divisors (3768515845).

65656621307 is a wasteful number, since it uses less digits than its factorization.

65656621307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125098.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 65656621307 in words is "sixty-five billion, six hundred fifty-six million, six hundred twenty-one thousand, three hundred seven".