406226820666 has 32 divisors (see below), whose sum is σ = 823225455360. Its totient is φ = 133615669824.

The previous prime is 406226820647. The next prime is 406226820689. The reversal of 406226820666 is 666028622604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549376 + ... + 1055588.

It is an arithmetic number, because the mean of its divisors is an integer number (25725795480).

Almost surely, 2^406226820666 is an apocalyptic number.

406226820666 is an abundant number, since it is smaller than the sum of its proper divisors (416998634694).

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

406226820666 is a wasteful number, since it uses less digits than its factorization.

406226820666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507990.

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 406226820666 in words is "four hundred six billion, two hundred twenty-six million, eight hundred twenty thousand, six hundred sixty-six".