40006599 has 4 divisors (see below), whose sum is σ = 53342136. Its totient is φ = 26671064.

The previous prime is 40006579. The next prime is 40006607. The reversal of 40006599 is 99560004.

It is a happy number.

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 40006599 - 2⁷ = 40006471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006579) 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, 6667764 + ... + 6667769.

It is an arithmetic number, because the mean of its divisors is an integer number (13335534).

Almost surely, 2^40006599 is an apocalyptic number.

40006599 is a deficient number, since it is larger than the sum of its proper divisors (13335537).

40006599 is a wasteful number, since it uses less digits than its factorization.

40006599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13335536.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 40006599 is about 6325.0769955788. The cubic root of 40006599 is about 342.0139951867.

The spelling of 40006599 in words is "forty million, six thousand, five hundred ninety-nine".