2215666466 has 16 divisors (see below), whose sum is σ = 3580148544. Its totient is φ = 1022331024.

The previous prime is 2215666459. The next prime is 2215666477. The reversal of 2215666466 is 6646665122.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 105365 + ... + 124631.

It is an arithmetic number, because the mean of its divisors is an integer number (223759284).

Almost surely, 2^2215666466 is an apocalyptic number.

2215666466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2215666466 is a deficient number, since it is larger than the sum of its proper divisors (1364482078).

2215666466 is a wasteful number, since it uses less digits than its factorization.

2215666466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23705.

The product of its digits is 622080, while the sum is 44.

The square root of 2215666466 is about 47070.8664249980. The cubic root of 2215666466 is about 1303.6713705254.

The spelling of 2215666466 in words is "two billion, two hundred fifteen million, six hundred sixty-six thousand, four hundred sixty-six".