406661215 has 8 divisors (see below), whose sum is σ = 488150208. Its totient is φ = 325224480.

The previous prime is 406661179. The next prime is 406661219. The reversal of 406661215 is 512166604.

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

It is not a de Polignac number, because 406661215 - 2¹¹ = 406659167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406661219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6810 + ... + 29320.

It is an arithmetic number, because the mean of its divisors is an integer number (61018776).

Almost surely, 2^406661215 is an apocalyptic number.

406661215 is a deficient number, since it is larger than the sum of its proper divisors (81488993).

406661215 is a wasteful number, since it uses less digits than its factorization.

406661215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26129.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 406661215 is about 20165.8427793137. The cubic root of 406661215 is about 740.8738246946.

The spelling of 406661215 in words is "four hundred six million, six hundred sixty-one thousand, two hundred fifteen".