40240666 has 32 divisors (see below), whose sum is σ = 67004928. Its totient is φ = 18040320.

The previous prime is 40240657. The next prime is 40240691. The reversal of 40240666 is 66604204.

It is a super-2 number, since 2×40240666² = 3238622400247112, which contains 22 as substring.

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, 76681 + ... + 77203.

It is an arithmetic number, because the mean of its divisors is an integer number (2093904).

Almost surely, 2^40240666 is an apocalyptic number.

40240666 is a deficient number, since it is larger than the sum of its proper divisors (26764262).

40240666 is a wasteful number, since it uses less digits than its factorization.

40240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 40240666 is about 6343.5531053188. The cubic root of 40240666 is about 342.6797067834.

The spelling of 40240666 in words is "forty million, two hundred forty thousand, six hundred sixty-six".