40661725 has 12 divisors (see below), whose sum is σ = 54299476. Its totient is φ = 30026880.

The previous prime is 40661713. The next prime is 40661743. The reversal of 40661725 is 52716604.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 15280281 + 25381444 = 3909^2 + 5038^2 .

It is not a de Polignac number, because 40661725 - 2⁹ = 40661213 is a prime.

It is a Duffinian number.

It is a congruent 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, 62232 + ... + 62881.

Almost surely, 2^40661725 is an apocalyptic number.

It is an amenable number.

40661725 is a deficient number, since it is larger than the sum of its proper divisors (13637751).

40661725 is a wasteful number, since it uses less digits than its factorization.

40661725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125136 (or 125131 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 40661725 is about 6376.6546872165. The cubic root of 40661725 is about 343.8707740908.

The spelling of 40661725 in words is "forty million, six hundred sixty-one thousand, seven hundred twenty-five".