671725365 has 16 divisors (see below), whose sum is σ = 1075845888. Its totient is φ = 357891776.

The previous prime is 671725361. The next prime is 671725409. The reversal of 671725365 is 563527176.

It is a cyclic number.

It is not a de Polignac number, because 671725365 - 2² = 671725361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671725361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6909 + ... + 37298.

It is an arithmetic number, because the mean of its divisors is an integer number (67240368).

Almost surely, 2^671725365 is an apocalyptic number.

It is an amenable number.

671725365 is a deficient number, since it is larger than the sum of its proper divisors (404120523).

671725365 is a wasteful number, since it uses less digits than its factorization.

671725365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45228.

The product of its digits is 264600, while the sum is 42.

The square root of 671725365 is about 25917.6651147437. The cubic root of 671725365 is about 875.7844893737.

The spelling of 671725365 in words is "six hundred seventy-one million, seven hundred twenty-five thousand, three hundred sixty-five".