40666313 has 4 divisors (see below), whose sum is σ = 41046480. Its totient is φ = 40286148.

The previous prime is 40666309. The next prime is 40666319. The reversal of 40666313 is 31366604.

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 a cyclic number.

It is not a de Polignac number, because 40666313 - 2² = 40666309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40666319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189923 + ... + 190136.

It is an arithmetic number, because the mean of its divisors is an integer number (10261620).

Almost surely, 2^40666313 is an apocalyptic number.

It is an amenable number.

40666313 is a deficient number, since it is larger than the sum of its proper divisors (380167).

40666313 is a wasteful number, since it uses less digits than its factorization.

40666313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380166.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 40666313 is about 6377.0144268302. The cubic root of 40666313 is about 343.8837069721.

The spelling of 40666313 in words is "forty million, six hundred sixty-six thousand, three hundred thirteen".