2661284401 has 2 divisors, whose sum is σ = 2661284402. Its totient is φ = 2661284400.

The previous prime is 2661284399. The next prime is 2661284407. The reversal of 2661284401 is 1044821662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1957974001 + 703310400 = 44249^2 + 26520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661284401 - 2¹ = 2661284399 is a prime.

Together with 2661284399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2661284407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330642200 + 1330642201.

It is an arithmetic number, because the mean of its divisors is an integer number (1330642201).

Almost surely, 2^2661284401 is an apocalyptic number.

It is an amenable number.

2661284401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661284401 is an equidigital number, since it uses as much as digits as its factorization.

2661284401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 2661284401 is about 51587.6380637842. The cubic root of 2661284401 is about 1385.7889566688.

The spelling of 2661284401 in words is "two billion, six hundred sixty-one million, two hundred eighty-four thousand, four hundred one".