405661006 has 8 divisors (see below), whose sum is σ = 615822984. Its totient is φ = 200386680.

The previous prime is 405660991. The next prime is 405661013. The reversal of 405661006 is 600166504.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221705 + ... + 1222036.

It is an arithmetic number, because the mean of its divisors is an integer number (76977873).

Almost surely, 2^405661006 is an apocalyptic number.

405661006 is a deficient number, since it is larger than the sum of its proper divisors (210161978).

405661006 is a wasteful number, since it uses less digits than its factorization.

405661006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443826.

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

The square root of 405661006 is about 20141.0279280875. The cubic root of 405661006 is about 740.2659173366.

The spelling of 405661006 in words is "four hundred five million, six hundred sixty-one thousand, six".