40668007 has 4 divisors (see below), whose sum is σ = 40911696. Its totient is φ = 40424320.

The previous prime is 40667993. The next prime is 40668059. The reversal of 40668007 is 70086604.

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 40668007 - 2¹¹ = 40665959 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40668007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40668077) 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, 121594 + ... + 121927.

It is an arithmetic number, because the mean of its divisors is an integer number (10227924).

Almost surely, 2^40668007 is an apocalyptic number.

40668007 is a deficient number, since it is larger than the sum of its proper divisors (243689).

40668007 is a wasteful number, since it uses less digits than its factorization.

40668007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243688.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40668007 is about 6377.1472462222. The cubic root of 40668007 is about 343.8884818571. Note that the first 3 decimals are identical.

The spelling of 40668007 in words is "forty million, six hundred sixty-eight thousand, seven".