7222135142666 has 32 divisors (see below), whose sum is σ = 11127754744848. Its totient is φ = 3513368770560.

The previous prime is 7222135142647. The next prime is 7222135142699. The reversal of 7222135142666 is 6662415312227.

It can be written as a sum of positive squares in 8 ways, for example, as 553939321441 + 6668195821225 = 744271^2 + 2582285^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7222135142666.

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, 171636206 + ... + 171678278.

Almost surely, 2^{7222135142666} is an apocalyptic number.

7222135142666 is a deficient number, since it is larger than the sum of its proper divisors (3905619602182).

7222135142666 is a wasteful number, since it uses less digits than its factorization.

7222135142666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47786.

The product of its digits is 1451520, while the sum is 47.

The spelling of 7222135142666 in words is "seven trillion, two hundred twenty-two billion, one hundred thirty-five million, one hundred forty-two thousand, six hundred sixty-six".