2076646661 has 2 divisors, whose sum is σ = 2076646662. Its totient is φ = 2076646660.

The previous prime is 2076646643. The next prime is 2076646699. The reversal of 2076646661 is 1666466702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2036716900 + 39929761 = 45130^2 + 6319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2076646661 is a prime.

It is a super-2 number, since 2×2076646661² = 8624922709284897842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2076643661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1038323330 + 1038323331.

It is an arithmetic number, because the mean of its divisors is an integer number (1038323331).

Almost surely, 2^2076646661 is an apocalyptic number.

It is an amenable number.

2076646661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2076646661 is an equidigital number, since it uses as much as digits as its factorization.

2076646661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 2076646661 is about 45570.2387639126. The cubic root of 2076646661 is about 1275.8145068047.

The spelling of 2076646661 in words is "two billion, seventy-six million, six hundred forty-six thousand, six hundred sixty-one".