671021008 has 60 divisors (see below), whose sum is σ = 1578451552. Its totient is φ = 270650880.

The previous prime is 671021003. The next prime is 671021027. The reversal of 671021008 is 800120176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671021003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22003 + ... + 42733.

Almost surely, 2^671021008 is an apocalyptic number.

671021008 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671021008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789225776).

671021008 is an abundant number, since it is smaller than the sum of its proper divisors (907430544).

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

671021008 is a wasteful number, since it uses less digits than its factorization.

671021008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20780 (or 20757 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 671021008 is about 25904.0731932258. The cubic root of 671021008 is about 875.4782726251.

The spelling of 671021008 in words is "six hundred seventy-one million, twenty-one thousand, eight".