674166847745 has 4 divisors (see below), whose sum is σ = 809000217300. Its totient is φ = 539333478192.

The previous prime is 674166847723. The next prime is 674166847747. The reversal of 674166847745 is 547748661476.

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 78033070336 + 596133777409 = 279344^2 + 772097^2 .

It is a cyclic number.

It is not a de Polignac number, because 674166847745 - 2³² = 669871880449 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (674166847747) 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, 67416684770 + ... + 67416684779.

It is an arithmetic number, because the mean of its divisors is an integer number (202250054325).

Almost surely, 2^674166847745 is an apocalyptic number.

It is an amenable number.

674166847745 is a deficient number, since it is larger than the sum of its proper divisors (134833369555).

674166847745 is a wasteful number, since it uses less digits than its factorization.

674166847745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134833369554.

The product of its digits is 189665280, while the sum is 65.

The spelling of 674166847745 in words is "six hundred seventy-four billion, one hundred sixty-six million, eight hundred forty-seven thousand, seven hundred forty-five".