2661329 has 4 divisors (see below), whose sum is σ = 2903280. Its totient is φ = 2419380.

The previous prime is 2661317. The next prime is 2661331. The reversal of 2661329 is 9231662.

2661329 = T₃₈₅ + T₃₈₆ + ... + T₄₁₇.

2661329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2661329 - 2¹⁶ = 2595793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2661929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120959 + ... + 120980.

It is an arithmetic number, because the mean of its divisors is an integer number (725820).

2^2661329 is an apocalyptic number.

It is an amenable number.

2661329 is a deficient number, since it is larger than the sum of its proper divisors (241951).

2661329 is a wasteful number, since it uses less digits than its factorization.

2661329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241950.

The product of its digits is 3888, while the sum is 29.

The square root of 2661329 is about 1631.3580232432. The cubic root of 2661329 is about 138.5796697850.

The spelling of 2661329 in words is "two million, six hundred sixty-one thousand, three hundred twenty-nine".