40785666 has 32 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 12695760.

The previous prime is 40785659. The next prime is 40785691. The reversal of 40785666 is 66658704.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5575 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^40785666 is an apocalyptic number.

40785666 is an abundant number, since it is smaller than the sum of its proper divisors (46305534).

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

40785666 is a wasteful number, since it uses less digits than its factorization.

40785666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 40785666 is about 6386.3656331281. The cubic root of 40785666 is about 344.2198038625.

The spelling of 40785666 in words is "forty million, seven hundred eighty-five thousand, six hundred sixty-six".