2679061661 has 2 divisors, whose sum is σ = 2679061662. Its totient is φ = 2679061660.

The previous prime is 2679061591. The next prime is 2679061669. The reversal of 2679061661 is 1661609762.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2678580025 + 481636 = 51755^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 2679061661 - 2¹⁸ = 2678799517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2679061669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339530830 + 1339530831.

It is an arithmetic number, because the mean of its divisors is an integer number (1339530831).

Almost surely, 2^2679061661 is an apocalyptic number.

It is an amenable number.

2679061661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2679061661 is an equidigital number, since it uses as much as digits as its factorization.

2679061661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 2679061661 is about 51759.6528292067. The cubic root of 2679061661 is about 1388.8677806259.

The spelling of 2679061661 in words is "two billion, six hundred seventy-nine million, sixty-one thousand, six hundred sixty-one".