671113664 has 56 divisors (see below), whose sum is σ = 1440564048. Its totient is φ = 308367360.

The previous prime is 671113657. The next prime is 671113691. The reversal of 671113664 is 466311176.

It is a congruent number.

It is an unprimeable number.

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, 198839 + ... + 202185.

It is an arithmetic number, because the mean of its divisors is an integer number (25724358).

Almost surely, 2^671113664 is an apocalyptic number.

671113664 is a gapful number since it is divisible by the number (64) 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 671113664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720282024).

671113664 is an abundant number, since it is smaller than the sum of its proper divisors (769450384).

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

671113664 is a wasteful number, since it uses less digits than its factorization.

671113664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613 (or 3603 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 671113664 is about 25905.8615760990. The cubic root of 671113664 is about 875.5185667344.

The spelling of 671113664 in words is "six hundred seventy-one million, one hundred thirteen thousand, six hundred sixty-four".