666783345 has 16 divisors (see below), whose sum is σ = 1067565312. Its totient is φ = 355380480.

The previous prime is 666783331. The next prime is 666783373. The reversal of 666783345 is 543387666.

It is a happy number.

It is not a de Polignac number, because 666783345 - 2⁹ = 666782833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666783294 and 666783303.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9705 + ... + 37785.

It is an arithmetic number, because the mean of its divisors is an integer number (66722832).

Almost surely, 2^666783345 is an apocalyptic number.

It is an amenable number.

666783345 is a deficient number, since it is larger than the sum of its proper divisors (400781967).

666783345 is a wasteful number, since it uses less digits than its factorization.

666783345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29672.

The product of its digits is 2177280, while the sum is 48.

The square root of 666783345 is about 25822.1483420725. The cubic root of 666783345 is about 873.6314257197.

The spelling of 666783345 in words is "six hundred sixty-six million, seven hundred eighty-three thousand, three hundred forty-five".