666783347 has 8 divisors (see below), whose sum is σ = 671400576. Its totient is φ = 662175232.

The previous prime is 666783331. The next prime is 666783373. The reversal of 666783347 is 743387666.

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

It is a cyclic number.

It is not a de Polignac number, because 666783347 - 2⁴ = 666783331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666783295 and 666783304.

It is not an unprimeable number, because it can be changed into a prime (666783307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208958 + ... + 212124.

It is an arithmetic number, because the mean of its divisors is an integer number (83925072).

Almost surely, 2^666783347 is an apocalyptic number.

666783347 is a deficient number, since it is larger than the sum of its proper divisors (4617229).

666783347 is a wasteful number, since it uses less digits than its factorization.

666783347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its digits is 3048192, while the sum is 50.

The square root of 666783347 is about 25822.1483807990. The cubic root of 666783347 is about 873.6314265932.

The spelling of 666783347 in words is "six hundred sixty-six million, seven hundred eighty-three thousand, three hundred forty-seven".