2673820661 has 2 divisors, whose sum is σ = 2673820662. Its totient is φ = 2673820660.

The previous prime is 2673820637. The next prime is 2673820693. The reversal of 2673820661 is 1660283762.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1696945636 + 976875025 = 41194^2 + 31255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2673820661 - 2²² = 2669626357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2673820361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1336910330 + 1336910331.

It is an arithmetic number, because the mean of its divisors is an integer number (1336910331).

Almost surely, 2^2673820661 is an apocalyptic number.

It is an amenable number.

2673820661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2673820661 is an equidigital number, since it uses as much as digits as its factorization.

2673820661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 2673820661 is about 51708.9998066101. Note that the first 3 decimals coincide. The cubic root of 2673820661 is about 1387.9615170712.

The spelling of 2673820661 in words is "two billion, six hundred seventy-three million, eight hundred twenty thousand, six hundred sixty-one".