671565546 has 32 divisors (see below), whose sum is σ = 1557256320. Its totient is φ = 214121952.

The previous prime is 671565541. The next prime is 671565551. The reversal of 671565546 is 645565176.

It is an interprime number because it is at equal distance from previous prime (671565541) and next prime (671565551).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (671565541) 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 15 ways as a sum of consecutive naturals, for example, 269115 + ... + 271598.

It is an arithmetic number, because the mean of its divisors is an integer number (48664260).

Almost surely, 2^671565546 is an apocalyptic number.

671565546 is an abundant number, since it is smaller than the sum of its proper divisors (885690774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671565546 is a wasteful number, since it uses less digits than its factorization.

671565546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540747 (or 540741 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 671565546 is about 25914.5817253530. The cubic root of 671565546 is about 875.7150274029.

The spelling of 671565546 in words is "six hundred seventy-one million, five hundred sixty-five thousand, five hundred forty-six".