671566752 has 36 divisors (see below), whose sum is σ = 1909768770. Its totient is φ = 223855488.

The previous prime is 671566741. The next prime is 671566769. The reversal of 671566752 is 257665176.

It can be written as a sum of positive squares in only one way, i.e., 340181136 + 331385616 = 18444^2 + 18204^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 671566698 and 671566707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1165627 + ... + 1166202.

Almost surely, 2^671566752 is an apocalyptic number.

It is an amenable number.

671566752 is an abundant number, since it is smaller than the sum of its proper divisors (1238202018).

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

671566752 is a wasteful number, since it uses less digits than its factorization.

671566752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331845 (or 2331834 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 671566752 is about 25914.6049940955. The cubic root of 671566752 is about 875.7155516067.

The spelling of 671566752 in words is "six hundred seventy-one million, five hundred sixty-six thousand, seven hundred fifty-two".