40188066 has 16 divisors (see below), whose sum is σ = 80525664. Its totient is φ = 13371104.

The previous prime is 40188053. The next prime is 40188091. The reversal of 40188066 is 66088104.

It is a Curzon number.

It is an unprimeable number.

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, 2571 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (5032854).

Almost surely, 2^40188066 is an apocalyptic number.

40188066 is an abundant number, since it is smaller than the sum of its proper divisors (40337598).

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

40188066 is a wasteful number, since it uses less digits than its factorization.

40188066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12465.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 40188066 is about 6339.4058081180. The cubic root of 40188066 is about 342.5303320856.

The spelling of 40188066 in words is "forty million, one hundred eighty-eight thousand, sixty-six".