2737728661 has 2 divisors, whose sum is σ = 2737728662. Its totient is φ = 2737728660.

The previous prime is 2737728659. The next prime is 2737728751. The reversal of 2737728661 is 1668277372.

It is a happy number.

2737728661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2332310436 + 405418225 = 48294^2 + 20135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2737728661 - 2¹ = 2737728659 is a prime.

Together with 2737728659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2737728641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1368864330 + 1368864331.

It is an arithmetic number, because the mean of its divisors is an integer number (1368864331).

Almost surely, 2^2737728661 is an apocalyptic number.

It is an amenable number.

2737728661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2737728661 is an equidigital number, since it uses as much as digits as its factorization.

2737728661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 2737728661 is about 52323.3089645523. The cubic root of 2737728661 is about 1398.9326321879.

The spelling of 2737728661 in words is "two billion, seven hundred thirty-seven million, seven hundred twenty-eight thousand, six hundred sixty-one".