40066 has 16 divisors (see below), whose sum is σ = 68544. Its totient is φ = 17424.

The previous prime is 40063. The next prime is 40087. The reversal of 40066 is 66004.

It is an Ulam number.

40066 is a modest number, since divided by 66 gives 4 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (4284).

2⁴⁰⁰⁶⁶ is an apocalyptic number.

40066 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

40066 is a deficient number, since it is larger than the sum of its proper divisors (28478).

40066 is a wasteful number, since it uses less digits than its factorization.

40066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40066 is about 200.1649319936. The cubic root of 40066 is about 34.2183183331.

The spelling of 40066 in words is "forty thousand, sixty-six", and thus it is an eban number.