671626825 has 12 divisors (see below), whose sum is σ = 834112908. Its totient is φ = 536465600.

The previous prime is 671626819. The next prime is 671626853. The reversal of 671626825 is 528626176.

It can be written as a sum of positive squares in 6 ways, for example, as 40411449 + 631215376 = 6357^2 + 25124^2 .

It is not a de Polignac number, because 671626825 - 2¹⁵ = 671594057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4246 + ... + 36895.

It is an arithmetic number, because the mean of its divisors is an integer number (69509409).

Almost surely, 2^671626825 is an apocalyptic number.

It is an amenable number.

671626825 is a deficient number, since it is larger than the sum of its proper divisors (162486083).

671626825 is a wasteful number, since it uses less digits than its factorization.

671626825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41804 (or 41799 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 671626825 is about 25915.7640250100. The cubic root of 671626825 is about 875.7416623354.

The spelling of 671626825 in words is "six hundred seventy-one million, six hundred twenty-six thousand, eight hundred twenty-five".