40105666 has 16 divisors (see below), whose sum is σ = 62596800. Its totient is φ = 19248208.

The previous prime is 40105651. The next prime is 40105687. The reversal of 40105666 is 66650104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8451 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (3912300).

Almost surely, 2^40105666 is an apocalyptic number.

40105666 is a deficient number, since it is larger than the sum of its proper divisors (22491134).

40105666 is a wasteful number, since it uses less digits than its factorization.

40105666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40105666 is about 6332.9034415503. The cubic root of 40105666 is about 342.2960684156.

The spelling of 40105666 in words is "forty million, one hundred five thousand, six hundred sixty-six".