65666945703 has 16 divisors (see below), whose sum is σ = 92250435200. Its totient is φ = 41435025120.

The previous prime is 65666945693. The next prime is 65666945713. The reversal of 65666945703 is 30754966656.

It is an interprime number because it is at equal distance from previous prime (65666945693) and next prime (65666945713).

It is not a de Polignac number, because 65666945703 - 2⁸ = 65666945447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65666945713) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 477913 + ... + 599778.

It is an arithmetic number, because the mean of its divisors is an integer number (5765652200).

Almost surely, 2^65666945703 is an apocalyptic number.

65666945703 is a deficient number, since it is larger than the sum of its proper divisors (26583489497).

65666945703 is a wasteful number, since it uses less digits than its factorization.

65666945703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078782.

The product of its (nonzero) digits is 24494400, while the sum is 57.

The spelling of 65666945703 in words is "sixty-five billion, six hundred sixty-six million, nine hundred forty-five thousand, seven hundred three".