2660729 has 4 divisors (see below), whose sum is σ = 2666640. Its totient is φ = 2654820.

The previous prime is 2660719. The next prime is 2660737. The reversal of 2660729 is 9270662.

2660729 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 2660729 - 2⁸ = 2660473 is a prime.

It is a super-2 number, since 2×2660729² = 14158957622882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2660695 and 2660704.

It is not an unprimeable number, because it can be changed into a prime (2660719) 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, 2219 + ... + 3200.

It is an arithmetic number, because the mean of its divisors is an integer number (666660).

2^2660729 is an apocalyptic number.

It is an amenable number.

2660729 is a deficient number, since it is larger than the sum of its proper divisors (5911).

2660729 is an equidigital number, since it uses as much as digits as its factorization.

2660729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 2660729 is about 1631.1741170090. The cubic root of 2660729 is about 138.5692546815.

The spelling of 2660729 in words is "two million, six hundred sixty thousand, seven hundred twenty-nine".