40350665 has 4 divisors (see below), whose sum is σ = 48420804. Its totient is φ = 32280528.

The previous prime is 40350659. The next prime is 40350689. The reversal of 40350665 is 56605304.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12588304 + 27762361 = 3548^2 + 5269^2 .

It is a cyclic number.

It is not a de Polignac number, because 40350665 - 2²² = 36156361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4035062 + ... + 4035071.

It is an arithmetic number, because the mean of its divisors is an integer number (12105201).

Almost surely, 2^40350665 is an apocalyptic number.

It is an amenable number.

40350665 is a deficient number, since it is larger than the sum of its proper divisors (8070139).

40350665 is an equidigital number, since it uses as much as digits as its factorization.

40350665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8070138.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 40350665 is about 6352.2173294055. The cubic root of 40350665 is about 342.9916642683.

Adding to 40350665 its reverse (56605304), we get a palindrome (96955969).

The spelling of 40350665 in words is "forty million, three hundred fifty thousand, six hundred sixty-five".