40665011 has 4 divisors (see below), whose sum is σ = 41530272. Its totient is φ = 39799752.

The previous prime is 40664993. The next prime is 40665017. The reversal of 40665011 is 11056604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40665011 - 2¹⁴ = 40648627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40665017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432560 + ... + 432653.

It is an arithmetic number, because the mean of its divisors is an integer number (10382568).

Almost surely, 2^40665011 is an apocalyptic number.

40665011 is a deficient number, since it is larger than the sum of its proper divisors (865261).

40665011 is an equidigital number, since it uses as much as digits as its factorization.

40665011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865260.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40665011 is about 6376.9123406238. The cubic root of 40665011 is about 343.8800369289.

The spelling of 40665011 in words is "forty million, six hundred sixty-five thousand, eleven".