671325418 has 4 divisors (see below), whose sum is σ = 1006988130. Its totient is φ = 335662708.

The previous prime is 671325341. The next prime is 671325419. The reversal of 671325418 is 814523176.

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., 670447449 + 877969 = 25893^2 + 937^2 .

It is not an unprimeable number, because it can be changed into a prime (671325419) 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 as a sum of consecutive naturals, namely, 167831353 + ... + 167831356.

Almost surely, 2^671325418 is an apocalyptic number.

671325418 is a deficient number, since it is larger than the sum of its proper divisors (335662712).

671325418 is a wasteful number, since it uses less digits than its factorization.

671325418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335662711.

The product of its digits is 40320, while the sum is 37.

The square root of 671325418 is about 25909.9482438696. The cubic root of 671325418 is about 875.6106400909.

It can be divided in two parts, 6713 and 25418, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 671325418 in words is "six hundred seventy-one million, three hundred twenty-five thousand, four hundred eighteen".