67665725 has 6 divisors (see below), whose sum is σ = 83905530. Its totient is φ = 54132560.

The previous prime is 67665709. The next prime is 67665733. The reversal of 67665725 is 52756676.

It can be written as a sum of positive squares in 3 ways, for example, as 15984004 + 51681721 = 3998^2 + 7189^2 .

It is not a de Polignac number, because 67665725 - 2⁴ = 67665709 is a prime.

It is a Curzon number.

It is a congruent number.

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, 1353290 + ... + 1353339.

It is an arithmetic number, because the mean of its divisors is an integer number (13984255).

Almost surely, 2^67665725 is an apocalyptic number.

It is an amenable number.

67665725 is a deficient number, since it is larger than the sum of its proper divisors (16239805).

67665725 is a wasteful number, since it uses less digits than its factorization.

67665725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706639 (or 2706634 counting only the distinct ones).

The product of its digits is 529200, while the sum is 44.

The square root of 67665725 is about 8225.9178819145. The cubic root of 67665725 is about 407.4955900510.

The spelling of 67665725 in words is "sixty-seven million, six hundred sixty-five thousand, seven hundred twenty-five".