7664447 has 4 divisors (see below), whose sum is σ = 8759376. Its totient is φ = 6569520.

The previous prime is 7664407. The next prime is 7664453. The reversal of 7664447 is 7444667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7444667 = 337 ⋅22091.

It is a cyclic number.

It is not a de Polignac number, because 7664447 - 2¹⁸ = 7402303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7664447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547454 + ... + 547467.

It is an arithmetic number, because the mean of its divisors is an integer number (2189844).

Almost surely, 2^7664447 is an apocalyptic number.

7664447 is a deficient number, since it is larger than the sum of its proper divisors (1094929).

7664447 is a wasteful number, since it uses less digits than its factorization.

7664447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094928.

The product of its digits is 112896, while the sum is 38.

The square root of 7664447 is about 2768.4737672588. The cubic root of 7664447 is about 197.1636919249.

The spelling of 7664447 in words is "seven million, six hundred sixty-four thousand, four hundred forty-seven".