674765645 has 8 divisors (see below), whose sum is σ = 820811256. Its totient is φ = 532417536.

The previous prime is 674765617. The next prime is 674765657. The reversal of 674765645 is 546567476.

It can be written as a sum of positive squares in 4 ways, for example, as 124300201 + 550465444 = 11149^2 + 23462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674765645 is a prime.

It is a super-3 number, since 3×674765645³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 674765593 and 674765602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923972 + ... + 924701.

It is an arithmetic number, because the mean of its divisors is an integer number (102601407).

Almost surely, 2^674765645 is an apocalyptic number.

It is an amenable number.

674765645 is a deficient number, since it is larger than the sum of its proper divisors (146045611).

674765645 is a wasteful number, since it uses less digits than its factorization.

674765645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848751.

The product of its digits is 4233600, while the sum is 50.

The square root of 674765645 is about 25976.2515579134. The cubic root of 674765645 is about 877.1037899827.

The spelling of 674765645 in words is "six hundred seventy-four million, seven hundred sixty-five thousand, six hundred forty-five".