656666436302343 has 16 divisors (see below), whose sum is σ = 1015136519888640. Its totient is φ = 418743814453272.

The previous prime is 656666436302273. The next prime is 656666436302347. The reversal of 656666436302343 is 343203634666656.

It is a happy number.

656666436302343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656666436302343 - 2⁸ = 656666436302087 is a prime.

It is a super-2 number, since 2×656666436302343² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656666436302347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528716936821 + ... + 528716938062.

It is an arithmetic number, because the mean of its divisors is an integer number (63446032493040).

Almost surely, 2^{656666436302343} is an apocalyptic number.

656666436302343 is a deficient number, since it is larger than the sum of its proper divisors (358470083586297).

656666436302343 is a wasteful number, since it uses less digits than its factorization.

656666436302343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057433874915 (or 1057433874909 counting only the distinct ones).

The product of its (nonzero) digits is 604661760, while the sum is 63.

The spelling of 656666436302343 in words is "six hundred fifty-six trillion, six hundred sixty-six billion, four hundred thirty-six million, three hundred two thousand, three hundred forty-three".