673391066 has 4 divisors (see below), whose sum is σ = 1010086602. Its totient is φ = 336695532.

The previous prime is 673391057. The next prime is 673391077. The reversal of 673391066 is 660193376.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 630763225 + 42627841 = 25115^2 + 6529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168347765 + ... + 168347768.

Almost surely, 2^673391066 is an apocalyptic number.

673391066 is a deficient number, since it is larger than the sum of its proper divisors (336695536).

673391066 is a wasteful number, since it uses less digits than its factorization.

673391066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336695535.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 673391066 is about 25949.7796907797. The cubic root of 673391066 is about 876.5077963608.

The spelling of 673391066 in words is "six hundred seventy-three million, three hundred ninety-one thousand, sixty-six".