2066991268 has 6 divisors (see below), whose sum is σ = 3617234726. Its totient is φ = 1033495632.

The previous prime is 2066991203. The next prime is 2066991293. The reversal of 2066991268 is 8621996602.

It can be written as a sum of positive squares in only one way, i.e., 1850548324 + 216442944 = 43018^2 + 14712^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258373905 + ... + 258373912.

Almost surely, 2^2066991268 is an apocalyptic number.

It is an amenable number.

2066991268 is a deficient number, since it is larger than the sum of its proper divisors (1550243458).

2066991268 is a wasteful number, since it uses less digits than its factorization.

2066991268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516747821 (or 516747819 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 2066991268 is about 45464.1756551243. The cubic root of 2066991268 is about 1273.8341295273.

The spelling of 2066991268 in words is "two billion, sixty-six million, nine hundred ninety-one thousand, two hundred sixty-eight".