40025661 has 8 divisors (see below), whose sum is σ = 57472800. Its totient is φ = 24631152.

The previous prime is 40025639. The next prime is 40025729. The reversal of 40025661 is 16652004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40025661 - 2¹⁰ = 40024637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40025621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513111 + ... + 513188.

It is an arithmetic number, because the mean of its divisors is an integer number (7184100).

Almost surely, 2^40025661 is an apocalyptic number.

It is an amenable number.

40025661 is a deficient number, since it is larger than the sum of its proper divisors (17447139).

40025661 is a wasteful number, since it uses less digits than its factorization.

40025661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026315.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40025661 is about 6326.5836752548. The cubic root of 40025661 is about 342.0683065233.

Adding to 40025661 its reverse (16652004), we get a palindrome (56677665).

The spelling of 40025661 in words is "forty million, twenty-five thousand, six hundred sixty-one".