671939266 has 8 divisors (see below), whose sum is σ = 1013735484. Its totient is φ = 334027440.

The previous prime is 671939249. The next prime is 671939269. The reversal of 671939266 is 662939176.

It can be written as a sum of positive squares in 2 ways, for example, as 501088225 + 170851041 = 22385^2 + 13071^2 .

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

It is not an unprimeable number, because it can be changed into a prime (671939269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970665 + ... + 971356.

Almost surely, 2^671939266 is an apocalyptic number.

671939266 is a deficient number, since it is larger than the sum of its proper divisors (341796218).

671939266 is a wasteful number, since it uses less digits than its factorization.

671939266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942196.

The product of its digits is 734832, while the sum is 49.

The square root of 671939266 is about 25921.7913347052. The cubic root of 671939266 is about 875.8774397108.

The spelling of 671939266 in words is "six hundred seventy-one million, nine hundred thirty-nine thousand, two hundred sixty-six".