40340661 has 16 divisors (see below), whose sum is σ = 54749184. Its totient is φ = 26417664.

The previous prime is 40340647. The next prime is 40340669. The reversal of 40340661 is 16604304.

It is not a de Polignac number, because 40340661 - 2¹⁹ = 39816373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40340669) 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, 42585 + ... + 43521.

It is an arithmetic number, because the mean of its divisors is an integer number (3421824).

Almost surely, 2^40340661 is an apocalyptic number.

It is an amenable number.

40340661 is a deficient number, since it is larger than the sum of its proper divisors (14408523).

40340661 is a wasteful number, since it uses less digits than its factorization.

40340661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 40340661 is about 6351.4298390205. The cubic root of 40340661 is about 342.9633163487.

Adding to 40340661 its reverse (16604304), we get a palindrome (56944965).

The spelling of 40340661 in words is "forty million, three hundred forty thousand, six hundred sixty-one".