671647876 has 12 divisors (see below), whose sum is σ = 1175576220. Its totient is φ = 335768960.

The previous prime is 671647793. The next prime is 671647877. The reversal of 671647876 is 678746176.

It can be written as a sum of positive squares in 2 ways, for example, as 278022276 + 393625600 = 16674^2 + 19840^2 .

It is a super-2 number, since 2×671647876² = 902221738670622752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671647877) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 27480 + ... + 45808.

It is an arithmetic number, because the mean of its divisors is an integer number (97964685).

Almost surely, 2^671647876 is an apocalyptic number.

It is an amenable number.

671647876 is a deficient number, since it is larger than the sum of its proper divisors (503928344).

671647876 is a wasteful number, since it uses less digits than its factorization.

671647876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27494 (or 27492 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 671647876 is about 25916.1701645903. The cubic root of 671647876 is about 875.7508117839.

The spelling of 671647876 in words is "six hundred seventy-one million, six hundred forty-seven thousand, eight hundred seventy-six".