40661159 has 16 divisors (see below), whose sum is σ = 53364480. Its totient is φ = 30015360.

The previous prime is 40661147. The next prime is 40661167. The reversal of 40661159 is 95116604.

40661159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40661159 - 2⁴ = 40661143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40661459) 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 15 ways as a sum of consecutive naturals, for example, 12434 + ... + 15359.

It is an arithmetic number, because the mean of its divisors is an integer number (3335280).

Almost surely, 2^40661159 is an apocalyptic number.

40661159 is a deficient number, since it is larger than the sum of its proper divisors (12703321).

40661159 is a wasteful number, since it uses less digits than its factorization.

40661159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27830.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 40661159 is about 6376.6103064246. The cubic root of 40661159 is about 343.8691785547.

Subtracting 40661159 from its reverse (95116604), we obtain a palindrome (54455445).

It can be divided in two parts, 4066 and 1159, that added together give a palindrome (5225).

The spelling of 40661159 in words is "forty million, six hundred sixty-one thousand, one hundred fifty-nine".