7022171666 has 8 divisors (see below), whose sum is σ = 10549691964. Its totient is φ = 3505607680.

The previous prime is 7022171647. The next prime is 7022171669. The reversal of 7022171666 is 6661712207.

It can be written as a sum of positive squares in 2 ways, for example, as 6291821041 + 730350625 = 79321^2 + 27025^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7022171669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2737475 + ... + 2740038.

Almost surely, 2^7022171666 is an apocalyptic number.

7022171666 is a deficient number, since it is larger than the sum of its proper divisors (3527520298).

7022171666 is a wasteful number, since it uses less digits than its factorization.

7022171666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478156.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 7022171666 is about 83798.3989465193. The cubic root of 7022171666 is about 1914.9487147084.

The spelling of 7022171666 in words is "seven billion, twenty-two million, one hundred seventy-one thousand, six hundred sixty-six".