40006669 has 4 divisors (see below), whose sum is σ = 40216320. Its totient is φ = 39797020.

The previous prime is 40006663. The next prime is 40006697. The reversal of 40006669 is 96660004.

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 40006669 - 2¹⁷ = 39875597 is a prime.

It is a super-2 number, since 2×40006669² = 3201067128951122, which contains 22 as substring.

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 40006669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006663) 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, 104539 + ... + 104920.

It is an arithmetic number, because the mean of its divisors is an integer number (10054080).

Almost surely, 2^40006669 is an apocalyptic number.

It is an amenable number.

40006669 is a deficient number, since it is larger than the sum of its proper divisors (209651).

40006669 is a wasteful number, since it uses less digits than its factorization.

40006669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209650.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 40006669 is about 6325.0825291058. The cubic root of 40006669 is about 342.0141946618.

The spelling of 40006669 in words is "forty million, six thousand, six hundred sixty-nine".