671263744 has 22 divisors (see below), whose sum is σ = 1341874004. Its totient is φ = 335631360.

The previous prime is 671263699. The next prime is 671263753. The reversal of 671263744 is 447362176.

It is a junction number, because it is equal to n+sod(n) for n = 671263697 and 671263706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326742 + ... + 328789.

Almost surely, 2^671263744 is an apocalyptic number.

671263744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

671263744 is a deficient number, since it is larger than the sum of its proper divisors (670610260).

671263744 is an equidigital number, since it uses as much as digits as its factorization.

671263744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655551 (or 655533 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 671263744 is about 25908.7580559161. The cubic root of 671263744 is about 875.5838254429.

The spelling of 671263744 in words is "six hundred seventy-one million, two hundred sixty-three thousand, seven hundred forty-four".