40016691 has 96 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 20044800.

The previous prime is 40016687. The next prime is 40016719. The reversal of 40016691 is 19661004.

40016691 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 40016691 - 2² = 40016687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40016611) 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 95 ways as a sum of consecutive naturals, for example, 678220 + ... + 678278.

It is an arithmetic number, because the mean of its divisors is an integer number (786240).

Almost surely, 2^40016691 is an apocalyptic number.

40016691 is a deficient number, since it is larger than the sum of its proper divisors (35462349).

40016691 is a wasteful number, since it uses less digits than its factorization.

40016691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 40016691 is about 6325.8747221234. The cubic root of 40016691 is about 342.0427514013.

Adding to 40016691 its reverse (19661004), we get a palindrome (59677695).

The spelling of 40016691 in words is "forty million, sixteen thousand, six hundred ninety-one".