40415666 has 4 divisors (see below), whose sum is σ = 60623502. Its totient is φ = 20207832.

The previous prime is 40415659. The next prime is 40415677. The reversal of 40415666 is 66651404.

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

It can be written as a sum of positive squares in only one way, i.e., 34515625 + 5900041 = 5875^2 + 2429^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103915 + ... + 10103918.

Almost surely, 2^40415666 is an apocalyptic number.

40415666 is a deficient number, since it is larger than the sum of its proper divisors (20207836).

40415666 is a wasteful number, since it uses less digits than its factorization.

40415666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20207835.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 40415666 is about 6357.3316729584. The cubic root of 40415666 is about 343.1757408734.

The spelling of 40415666 in words is "forty million, four hundred fifteen thousand, six hundred sixty-six".