40666020 has 24 divisors (see below), whose sum is σ = 113865024. Its totient is φ = 10844256.

The previous prime is 40666007. The next prime is 40666051. The reversal of 40666020 is 2066604.

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, 338824 + ... + 338943.

It is an arithmetic number, because the mean of its divisors is an integer number (4744376).

Almost surely, 2^40666020 is an apocalyptic number.

It is an amenable number.

40666020 is an abundant number, since it is smaller than the sum of its proper divisors (73199004).

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

40666020 is a wasteful number, since it uses less digits than its factorization.

40666020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677779 (or 677777 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 40666020 is about 6376.9914536559. The cubic root of 40666020 is about 343.8828810782.

The spelling of 40666020 in words is "forty million, six hundred sixty-six thousand, twenty".