40665725 has 24 divisors (see below), whose sum is σ = 53032320. Its totient is φ = 30873920.

The previous prime is 40665721. The next prime is 40665749. The reversal of 40665725 is 52756604.

40665725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40665725 - 2² = 40665721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40665721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113096 + ... + 113454.

It is an arithmetic number, because the mean of its divisors is an integer number (2209680).

Almost surely, 2^40665725 is an apocalyptic number.

It is an amenable number.

40665725 is a deficient number, since it is larger than the sum of its proper divisors (12366595).

40665725 is a wasteful number, since it uses less digits than its factorization.

40665725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 40665725 is about 6376.9683235845. The cubic root of 40665725 is about 343.8820495429.

The spelling of 40665725 in words is "forty million, six hundred sixty-five thousand, seven hundred twenty-five".