40668406 has 8 divisors (see below), whose sum is σ = 61080264. Its totient is φ = 20308320.

The previous prime is 40668401. The next prime is 40668409. The reversal of 40668406 is 60486604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40668401) 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, 10915 + ... + 14158.

It is an arithmetic number, because the mean of its divisors is an integer number (7635033).

Almost surely, 2^40668406 is an apocalyptic number.

40668406 is a deficient number, since it is larger than the sum of its proper divisors (20411858).

40668406 is a wasteful number, since it uses less digits than its factorization.

40668406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25886.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 40668406 is about 6377.1785297261. The cubic root of 40668406 is about 343.8896065008.

The spelling of 40668406 in words is "forty million, six hundred sixty-eight thousand, four hundred six".