671477643 has 24 divisors (see below), whose sum is σ = 998899200. Its totient is φ = 434466864.

The previous prime is 671477581. The next prime is 671477671. The reversal of 671477643 is 346774176.

671477643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671477643 - 2¹⁶ = 671412107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671477683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33946 + ... + 49952.

It is an arithmetic number, because the mean of its divisors is an integer number (41620800).

Almost surely, 2^671477643 is an apocalyptic number.

671477643 is a deficient number, since it is larger than the sum of its proper divisors (327421557).

671477643 is a wasteful number, since it uses less digits than its factorization.

671477643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16151 (or 16148 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 671477643 is about 25912.8856555961. The cubic root of 671477643 is about 875.6768175129.

The spelling of 671477643 in words is "six hundred seventy-one million, four hundred seventy-seven thousand, six hundred forty-three".