666733340741 has 4 divisors (see below), whose sum is σ = 718020520812. Its totient is φ = 615446160672.

The previous prime is 666733340731. The next prime is 666733340753. The reversal of 666733340741 is 147043337666.

666733340741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 426250988641 + 240482352100 = 652879^2 + 490390^2 .

It is a cyclic number.

It is not a de Polignac number, because 666733340741 - 2¹⁰ = 666733339717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666733340741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666733340731) 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, 25643590016 + ... + 25643590041.

It is an arithmetic number, because the mean of its divisors is an integer number (179505130203).

Almost surely, 2^666733340741 is an apocalyptic number.

It is an amenable number.

666733340741 is a deficient number, since it is larger than the sum of its proper divisors (51287180071).

666733340741 is a wasteful number, since it uses less digits than its factorization.

666733340741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51287180070.

The product of its (nonzero) digits is 4572288, while the sum is 50.

The spelling of 666733340741 in words is "six hundred sixty-six billion, seven hundred thirty-three million, three hundred forty thousand, seven hundred forty-one".