665741347 has 4 divisors (see below), whose sum is σ = 668598840. Its totient is φ = 662883856.

The previous prime is 665741339. The next prime is 665741357. The reversal of 665741347 is 743147566.

665741347 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 is a cyclic number.

It is not a de Polignac number, because 665741347 - 2³ = 665741339 is a prime.

It is a super-2 number, since 2×665741347² = 886423082210748818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665741317) 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, 1428397 + ... + 1428862.

It is an arithmetic number, because the mean of its divisors is an integer number (167149710).

Almost surely, 2^665741347 is an apocalyptic number.

665741347 is a deficient number, since it is larger than the sum of its proper divisors (2857493).

665741347 is a wasteful number, since it uses less digits than its factorization.

665741347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857492.

The product of its digits is 423360, while the sum is 43.

The square root of 665741347 is about 25801.9640143924. The cubic root of 665741347 is about 873.1761070063.

The spelling of 665741347 in words is "six hundred sixty-five million, seven hundred forty-one thousand, three hundred forty-seven".