7664445 has 24 divisors (see below), whose sum is σ = 13372632. Its totient is φ = 4060800.

The previous prime is 7664407. The next prime is 7664453. The reversal of 7664445 is 5444667.

7664445 is a `hidden beast` number, since 7 + 6 + 644 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13689 + 7650756 = 117^2 + 2766^2 .

It is not a de Polignac number, because 7664445 - 2¹⁰ = 7663421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7675 + ... + 8615.

It is an arithmetic number, because the mean of its divisors is an integer number (557193).

Almost surely, 2^7664445 is an apocalyptic number.

It is an amenable number.

7664445 is a deficient number, since it is larger than the sum of its proper divisors (5708187).

7664445 is a wasteful number, since it uses less digits than its factorization.

7664445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1130 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 7664445 is about 2768.4734060489. The cubic root of 7664445 is about 197.1636747753.

The spelling of 7664445 in words is "seven million, six hundred sixty-four thousand, four hundred forty-five".