671646624 has 192 divisors, whose sum is σ = 1991485440. Its totient is φ = 196485120.

The previous prime is 671646617. The next prime is 671646683. The reversal of 671646624 is 426646176.

It is a happy number.

It is a super-2 number, since 2×671646624² = 902218375061194752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6924144 + ... + 6924240.

It is an arithmetic number, because the mean of its divisors is an integer number (10372320).

Almost surely, 2^671646624 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 671646624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995742720).

671646624 is an abundant number, since it is smaller than the sum of its proper divisors (1319838816).

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

671646624 is a wasteful number, since it uses less digits than its factorization.

671646624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 275 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 671646624 is about 25916.1460097755. The cubic root of 671646624 is about 875.7502676294.

The spelling of 671646624 in words is "six hundred seventy-one million, six hundred forty-six thousand, six hundred twenty-four".