40669345 has 4 divisors (see below), whose sum is σ = 48803220. Its totient is φ = 32535472.

The previous prime is 40669333. The next prime is 40669361. The reversal of 40669345 is 54396604.

It is a happy number.

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 26584336 + 14085009 = 5156^2 + 3753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40669345 is a prime.

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, 4066930 + ... + 4066939.

It is an arithmetic number, because the mean of its divisors is an integer number (12200805).

Almost surely, 2^40669345 is an apocalyptic number.

It is an amenable number.

40669345 is a deficient number, since it is larger than the sum of its proper divisors (8133875).

40669345 is an equidigital number, since it uses as much as digits as its factorization.

40669345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133874.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 40669345 is about 6377.2521512012. The cubic root of 40669345 is about 343.8922531897.

It can be divided in two parts, 40669 and 345, that added together give a palindrome (41014).

The spelling of 40669345 in words is "forty million, six hundred sixty-nine thousand, three hundred forty-five".