40665441 has 4 divisors (see below), whose sum is σ = 54220592. Its totient is φ = 27110292.

The previous prime is 40665439. The next prime is 40665473. The reversal of 40665441 is 14456604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40665441 - 2¹ = 40665439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40665399 and 40665408.

It is not an unprimeable number, because it can be changed into a prime (40665431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6777571 + ... + 6777576.

It is an arithmetic number, because the mean of its divisors is an integer number (13555148).

Almost surely, 2^40665441 is an apocalyptic number.

It is an amenable number.

40665441 is a deficient number, since it is larger than the sum of its proper divisors (13555151).

40665441 is a wasteful number, since it uses less digits than its factorization.

40665441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13555150.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 40665441 is about 6376.9460559111. The cubic root of 40665441 is about 343.8812490102.

The spelling of 40665441 in words is "forty million, six hundred sixty-five thousand, four hundred forty-one".