40666111 has 4 divisors (see below), whose sum is σ = 40706512. Its totient is φ = 40625712.

The previous prime is 40666103. The next prime is 40666117. The reversal of 40666111 is 11166604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40666111 - 2³ = 40666103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40666117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18651 + ... + 20716.

It is an arithmetic number, because the mean of its divisors is an integer number (10176628).

Almost surely, 2^40666111 is an apocalyptic number.

40666111 is a deficient number, since it is larger than the sum of its proper divisors (40401).

40666111 is a wasteful number, since it uses less digits than its factorization.

40666111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40400.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 40666111 is about 6376.9985886779. The cubic root of 40666111 is about 343.8831375849.

The spelling of 40666111 in words is "forty million, six hundred sixty-six thousand, one hundred eleven".