2516222666 has 16 divisors (see below), whose sum is σ = 4104365256. Its totient is φ = 1152101376.

The previous prime is 2516222659. The next prime is 2516222669. The reversal of 2516222666 is 6662226152.

2516222666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2393655625 + 122567041 = 48925^2 + 11071^2 .

It is not an unprimeable number, because it can be changed into a prime (2516222669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998831 + ... + 1001346.

Almost surely, 2^2516222666 is an apocalyptic number.

2516222666 is a deficient number, since it is larger than the sum of its proper divisors (1588142590).

2516222666 is a wasteful number, since it uses less digits than its factorization.

2516222666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000233.

The product of its digits is 103680, while the sum is 38.

The square root of 2516222666 is about 50161.9643355401. The cubic root of 2516222666 is about 1360.1381538575.

The spelling of 2516222666 in words is "two billion, five hundred sixteen million, two hundred twenty-two thousand, six hundred sixty-six".