7664729 has 4 divisors (see below), whose sum is σ = 7929060. Its totient is φ = 7400400.

The previous prime is 7664717. The next prime is 7664737. The reversal of 7664729 is 9274667.

7664729 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2647129 + 5017600 = 1627^2 + 2240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7664729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132122 + ... + 132179.

It is an arithmetic number, because the mean of its divisors is an integer number (1982265).

Almost surely, 2^7664729 is an apocalyptic number.

It is an amenable number.

7664729 is a deficient number, since it is larger than the sum of its proper divisors (264331).

7664729 is a wasteful number, since it uses less digits than its factorization.

7664729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264330.

The product of its digits is 127008, while the sum is 41.

The square root of 7664729 is about 2768.5246973795. The cubic root of 7664729 is about 197.1661099937.

The spelling of 7664729 in words is "seven million, six hundred sixty-four thousand, seven hundred twenty-nine".