40290666 has 32 divisors (see below), whose sum is σ = 87339840. Its totient is φ = 12317184.

The previous prime is 40290647. The next prime is 40290673. The reversal of 40290666 is 66609204.

40290666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11130 + ... + 14298.

It is an arithmetic number, because the mean of its divisors is an integer number (2729370).

Almost surely, 2^40290666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40290666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43669920).

40290666 is an abundant number, since it is smaller than the sum of its proper divisors (47049174).

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

40290666 is a wasteful number, since it uses less digits than its factorization.

40290666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40290666 is about 6347.4928908979. The cubic root of 40290666 is about 342.8215773128.

The spelling of 40290666 in words is "forty million, two hundred ninety thousand, six hundred sixty-six".