674423661 has 8 divisors (see below), whose sum is σ = 899500480. Its totient is φ = 449481312.

The previous prime is 674423647. The next prime is 674423683. The reversal of 674423661 is 166324476.

It is a happy number.

674423661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 674423661 - 2¹¹ = 674421613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674423611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21265 + ... + 42438.

It is an arithmetic number, because the mean of its divisors is an integer number (112437560).

Almost surely, 2^674423661 is an apocalyptic number.

It is an amenable number.

674423661 is a deficient number, since it is larger than the sum of its proper divisors (225076819).

674423661 is a wasteful number, since it uses less digits than its factorization.

674423661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67235.

The product of its digits is 145152, while the sum is 39.

The square root of 674423661 is about 25969.6680956842. The cubic root of 674423661 is about 876.9555873421.

The spelling of 674423661 in words is "six hundred seventy-four million, four hundred twenty-three thousand, six hundred sixty-one".