40666645 has 16 divisors (see below), whose sum is σ = 51206400. Its totient is φ = 30945024.

The previous prime is 40666627. The next prime is 40666657. The reversal of 40666645 is 54666604.

It is a cyclic number.

It is not a de Polignac number, because 40666645 - 2⁹ = 40666133 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 21997 + ... + 23773.

It is an arithmetic number, because the mean of its divisors is an integer number (3200400).

Almost surely, 2^40666645 is an apocalyptic number.

It is an amenable number.

40666645 is a deficient number, since it is larger than the sum of its proper divisors (10539755).

40666645 is a wasteful number, since it uses less digits than its factorization.

40666645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 40666645 is about 6377.0404577672. The cubic root of 40666645 is about 343.8846427923.

The spelling of 40666645 in words is "forty million, six hundred sixty-six thousand, six hundred forty-five".