2261661379 has 2 divisors, whose sum is σ = 2261661380. Its totient is φ = 2261661378.

The previous prime is 2261661361. The next prime is 2261661397. The reversal of 2261661379 is 9731661622.

2261661379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (2261661397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (2261661361) and next prime (2261661397).

It is a cyclic number.

It is not a de Polignac number, because 2261661379 - 2¹³ = 2261653187 is a prime.

It is a super-2 number, since 2×2261661379² = 10230224386520363282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2261661319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130830689 + 1130830690.

It is an arithmetic number, because the mean of its divisors is an integer number (1130830690).

Almost surely, 2^2261661379 is an apocalyptic number.

2261661379 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261661379 is an equidigital number, since it uses as much as digits as its factorization.

2261661379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 2261661379 is about 47556.9277708306. The cubic root of 2261661379 is about 1312.6306090916.

The spelling of 2261661379 in words is "two billion, two hundred sixty-one million, six hundred sixty-one thousand, three hundred seventy-nine".