671766528 has 96 divisors (see below), whose sum is σ = 1849236480. Its totient is φ = 216637440.

The previous prime is 671766523. The next prime is 671766569. The reversal of 671766528 is 825667176.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671766523) 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 7 ways as a sum of consecutive naturals, for example, 188701 + ... + 192227.

It is an arithmetic number, because the mean of its divisors is an integer number (19262880).

Almost surely, 2^671766528 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 671766528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924618240).

671766528 is an abundant number, since it is smaller than the sum of its proper divisors (1177469952).

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

671766528 is a wasteful number, since it uses less digits than its factorization.

671766528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583 (or 3563 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 671766528 is about 25918.4592134641. The cubic root of 671766528 is about 875.8023782226.

The spelling of 671766528 in words is "six hundred seventy-one million, seven hundred sixty-six thousand, five hundred twenty-eight".