40666506 has 16 divisors (see below), whose sum is σ = 83317248. Its totient is φ = 13224800.

The previous prime is 40666501. The next prime is 40666511. The reversal of 40666506 is 60566604.

It is an interprime number because it is at equal distance from previous prime (40666501) and next prime (40666511).

It is not an unprimeable number, because it can be changed into a prime (40666501) 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 7 ways as a sum of consecutive naturals, for example, 82410 + ... + 82901.

It is an arithmetic number, because the mean of its divisors is an integer number (5207328).

Almost surely, 2^40666506 is an apocalyptic number.

40666506 is an abundant number, since it is smaller than the sum of its proper divisors (42650742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40666506 is a wasteful number, since it uses less digits than its factorization.

40666506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165357.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 40666506 is about 6377.0295592854. The cubic root of 40666506 is about 343.8842509887.

The spelling of 40666506 in words is "forty million, six hundred sixty-six thousand, five hundred six".