2166225206635 has 16 divisors (see below), whose sum is σ = 3145577443776. Its totient is φ = 1398034418688.

The previous prime is 2166225206609. The next prime is 2166225206681. The reversal of 2166225206635 is 5366025226612.

It is a cyclic number.

It is not a de Polignac number, because 2166225206635 - 2¹³ = 2166225198443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1820356722 + ... + 1820357911.

It is an arithmetic number, because the mean of its divisors is an integer number (196598590236).

Almost surely, 2^{2166225206635} is an apocalyptic number.

2166225206635 is a deficient number, since it is larger than the sum of its proper divisors (979352237141).

2166225206635 is a wasteful number, since it uses less digits than its factorization.

2166225206635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640714662.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 2166225206635 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-five million, two hundred six thousand, six hundred thirty-five".