671648688 has 30 divisors (see below), whose sum is σ = 1879683884. Its totient is φ = 223882848.

The previous prime is 671648617. The next prime is 671648723. The reversal of 671648688 is 886846176.

It is a super-2 number, since 2×671648688² = 902223920184242688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2331970 + ... + 2332257.

Almost surely, 2^671648688 is an apocalyptic number.

It is an amenable number.

671648688 is an abundant number, since it is smaller than the sum of its proper divisors (1208035196).

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

671648688 is a wasteful number, since it uses less digits than its factorization.

671648688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664241 (or 4664232 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 671648688 is about 25916.1858304805. The cubic root of 671648688 is about 875.7511647016.

The spelling of 671648688 in words is "six hundred seventy-one million, six hundred forty-eight thousand, six hundred eighty-eight".