2660943949 has 2 divisors, whose sum is σ = 2660943950. Its totient is φ = 2660943948.

The previous prime is 2660943907. The next prime is 2660943973. The reversal of 2660943949 is 9493490662.

2660943949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822436100 + 838507849 = 42690^2 + 28957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660943949 - 2⁷ = 2660943821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2660943896 and 2660943905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660943979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330471974 + 1330471975.

It is an arithmetic number, because the mean of its divisors is an integer number (1330471975).

Almost surely, 2^2660943949 is an apocalyptic number.

It is an amenable number.

2660943949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660943949 is an equidigital number, since it uses as much as digits as its factorization.

2660943949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The square root of 2660943949 is about 51584.3382142293. The cubic root of 2660943949 is about 1385.7298605495.

The spelling of 2660943949 in words is "two billion, six hundred sixty million, nine hundred forty-three thousand, nine hundred forty-nine".