674945618 has 4 divisors (see below), whose sum is σ = 1012418430. Its totient is φ = 337472808.

The previous prime is 674945617. The next prime is 674945627. The reversal of 674945618 is 816549476.

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

It can be written as a sum of positive squares in only one way, i.e., 641963569 + 32982049 = 25337^2 + 5743^2 .

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (674945617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168736403 + ... + 168736406.

Almost surely, 2^674945618 is an apocalyptic number.

674945618 is a deficient number, since it is larger than the sum of its proper divisors (337472812).

674945618 is a wasteful number, since it uses less digits than its factorization.

674945618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337472811.

The product of its digits is 1451520, while the sum is 50.

The square root of 674945618 is about 25979.7155103746. The cubic root of 674945618 is about 877.1817632115.

The spelling of 674945618 in words is "six hundred seventy-four million, nine hundred forty-five thousand, six hundred eighteen".