40566139 has 4 divisors (see below), whose sum is σ = 40580280. Its totient is φ = 40552000.

The previous prime is 40566133. The next prime is 40566191. The reversal of 40566139 is 93166504.

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 40566139 - 2⁵ = 40566107 is a prime.

It is a super-2 number, since 2×40566139² = 3291223266734642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40566133) 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, 1069 + ... + 9070.

It is an arithmetic number, because the mean of its divisors is an integer number (10145070).

Almost surely, 2^40566139 is an apocalyptic number.

40566139 is a deficient number, since it is larger than the sum of its proper divisors (14141).

40566139 is a wasteful number, since it uses less digits than its factorization.

40566139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14140.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 40566139 is about 6369.1552815110. The cubic root of 40566139 is about 343.6011099992.

The spelling of 40566139 in words is "forty million, five hundred sixty-six thousand, one hundred thirty-nine".