2051666696 has 8 divisors (see below), whose sum is σ = 3846875070. Its totient is φ = 1025833344.

The previous prime is 2051666599. The next prime is 2051666789. The reversal of 2051666696 is 6966661502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1537737796 + 513928900 = 39214^2 + 22670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2051666696.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128229161 + ... + 128229176.

Almost surely, 2^2051666696 is an apocalyptic number.

It is an amenable number.

2051666696 is a deficient number, since it is larger than the sum of its proper divisors (1795208374).

2051666696 is a wasteful number, since it uses less digits than its factorization.

2051666696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256458343 (or 256458339 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 2051666696 is about 45295.3275294483. The cubic root of 2051666696 is about 1270.6782695557.

The spelling of 2051666696 in words is "two billion, fifty-one million, six hundred sixty-six thousand, six hundred ninety-six".