666350734433 has 4 divisors (see below), whose sum is σ = 684360213780. Its totient is φ = 648341255088.

The previous prime is 666350734409. The next prime is 666350734547. The reversal of 666350734433 is 334437053666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257559295009 + 408791439424 = 507503^2 + 639368^2 .

It is not a de Polignac number, because 666350734433 - 2¹⁰ = 666350733409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666350734333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9004739618 + ... + 9004739691.

It is an arithmetic number, because the mean of its divisors is an integer number (171090053445).

Almost surely, 2^666350734433 is an apocalyptic number.

It is an amenable number.

666350734433 is a deficient number, since it is larger than the sum of its proper divisors (18009479347).

666350734433 is a wasteful number, since it uses less digits than its factorization.

666350734433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18009479346.

The product of its (nonzero) digits is 9797760, while the sum is 50.

The spelling of 666350734433 in words is "six hundred sixty-six billion, three hundred fifty million, seven hundred thirty-four thousand, four hundred thirty-three".