671775552 has 448 divisors, whose sum is σ = 2470912000. Its totient is φ = 174680064.

The previous prime is 671775551. The next prime is 671775607. The reversal of 671775552 is 255577176.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

Its product of digits (514500) is a multiple of the sum of its prime divisors (147).

It is a junction number, because it is equal to n+sod(n) for n = 671775498 and 671775507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671775551) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 8503449 + ... + 8503527.

Almost surely, 2^671775552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671775552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235456000).

671775552 is an abundant number, since it is smaller than the sum of its proper divisors (1799136448).

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

671775552 is a wasteful number, since it uses less digits than its factorization.

671775552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 147 counting only the distinct ones).

The product of its digits is 514500, while the sum is 45.

The square root of 671775552 is about 25918.6332973018. The cubic root of 671775552 is about 875.8062998258.

The spelling of 671775552 in words is "six hundred seventy-one million, seven hundred seventy-five thousand, five hundred fifty-two".