671648577 has 8 divisors (see below), whose sum is σ = 896163840. Its totient is φ = 447449520.

The previous prime is 671648543. The next prime is 671648581. The reversal of 671648577 is 775846176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671648577 - 2⁶ = 671648513 is a prime.

It is a super-2 number, since 2×671648577² = 902223621972249858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671648587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74049 + ... + 82622.

It is an arithmetic number, because the mean of its divisors is an integer number (112020480).

Almost surely, 2^671648577 is an apocalyptic number.

It is an amenable number.

671648577 is a deficient number, since it is larger than the sum of its proper divisors (224515263).

671648577 is a wasteful number, since it uses less digits than its factorization.

671648577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158103.

The product of its digits is 1975680, while the sum is 51.

The square root of 671648577 is about 25916.1836889616. The cubic root of 671648577 is about 875.7511164580.

The spelling of 671648577 in words is "six hundred seventy-one million, six hundred forty-eight thousand, five hundred seventy-seven".