40143666 has 8 divisors (see below), whose sum is σ = 80287344. Its totient is φ = 13381220.

The previous prime is 40143661. The next prime is 40143679. The reversal of 40143666 is 66634104.

It is a sphenic number, since it is the product of 3 distinct primes.

40143666 is an admirable number.

It is a super-2 number, since 2×40143666² = 3223027839839112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40143661) 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 3 ways as a sum of consecutive naturals, for example, 3345300 + ... + 3345311.

It is an arithmetic number, because the mean of its divisors is an integer number (10035918).

Almost surely, 2^40143666 is an apocalyptic number.

40143666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40143666 is a wasteful number, since it uses less digits than its factorization.

40143666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690616.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 40143666 is about 6335.9029348626. The cubic root of 40143666 is about 342.4041424605.

The spelling of 40143666 in words is "forty million, one hundred forty-three thousand, six hundred sixty-six".