7664385 has 16 divisors (see below), whose sum is σ = 12386880. Its totient is φ = 4046400.

The previous prime is 7664369. The next prime is 7664407. The reversal of 7664385 is 5834667.

It is not a de Polignac number, because 7664385 - 2⁴ = 7664369 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1015 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (774180).

Almost surely, 2^7664385 is an apocalyptic number.

It is an amenable number.

7664385 is a deficient number, since it is larger than the sum of its proper divisors (4722495).

7664385 is a wasteful number, since it uses less digits than its factorization.

7664385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168.

The product of its digits is 120960, while the sum is 39.

The square root of 7664385 is about 2768.4625697307. The cubic root of 7664385 is about 197.1631602848.

It can be divided in two parts, 766 and 4385, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 7664385 in words is "seven million, six hundred sixty-four thousand, three hundred eighty-five".