671764608 has 192 divisors, whose sum is σ = 2081289600. Its totient is φ = 207304704.

The previous prime is 671764601. The next prime is 671764609. The reversal of 671764608 is 806467176.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×671764608² = 902535377122787328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671764601) 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 23 ways as a sum of consecutive naturals, for example, 1028410 + ... + 1029062.

It is an arithmetic number, because the mean of its divisors is an integer number (10840050).

Almost surely, 2^671764608 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 671764608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040644800).

671764608 is an abundant number, since it is smaller than the sum of its proper divisors (1409524992).

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

671764608 is a wasteful number, since it uses less digits than its factorization.

671764608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 671764608 is about 25918.4221741988. The cubic root of 671764608 is about 875.8015438344.

The spelling of 671764608 in words is "six hundred seventy-one million, seven hundred sixty-four thousand, six hundred eight".