65688057654 has 32 divisors (see below), whose sum is σ = 131669328384. Its totient is φ = 21847188000.

The previous prime is 65688057653. The next prime is 65688057671. The reversal of 65688057654 is 45675088656.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65688057653) 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, 13823779 + ... + 13828529.

It is an arithmetic number, because the mean of its divisors is an integer number (4114666512).

Almost surely, 2^65688057654 is an apocalyptic number.

65688057654 is an abundant number, since it is smaller than the sum of its proper divisors (65981270730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65688057654 is a wasteful number, since it uses less digits than its factorization.

65688057654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412.

The product of its (nonzero) digits is 48384000, while the sum is 60.

The spelling of 65688057654 in words is "sixty-five billion, six hundred eighty-eight million, fifty-seven thousand, six hundred fifty-four".