40666404 has 24 divisors (see below), whose sum is σ = 97453888. Its totient is φ = 13188960.

The previous prime is 40666391. The next prime is 40666411. The reversal of 40666404 is 40466604.

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, 45352 + ... + 46239.

Almost surely, 2^40666404 is an apocalyptic number.

It is an amenable number.

40666404 is an abundant number, since it is smaller than the sum of its proper divisors (56787484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40666404 is a wasteful number, since it uses less digits than its factorization.

40666404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91635 (or 91633 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 40666404 is about 6377.0215618265. The cubic root of 40666404 is about 343.8839634775.

The spelling of 40666404 in words is "forty million, six hundred sixty-six thousand, four hundred four".