666673604 has 6 divisors (see below), whose sum is σ = 1166678814. Its totient is φ = 333336800.

The previous prime is 666673589. The next prime is 666673613. The reversal of 666673604 is 406376666.

666673604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 650352004 + 16321600 = 25502^2 + 4040^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83334197 + ... + 83334204.

It is an arithmetic number, because the mean of its divisors is an integer number (194446469).

Almost surely, 2^666673604 is an apocalyptic number.

It is an amenable number.

666673604 is a deficient number, since it is larger than the sum of its proper divisors (500005210).

666673604 is a wasteful number, since it uses less digits than its factorization.

666673604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166668405 (or 166668403 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 44.

The square root of 666673604 is about 25820.0233152490. The cubic root of 666673604 is about 873.5834948852.

The spelling of 666673604 in words is "six hundred sixty-six million, six hundred seventy-three thousand, six hundred four".