1006665447 has 4 divisors (see below), whose sum is σ = 1342220600. Its totient is φ = 671110296.

The previous prime is 1006665437. The next prime is 1006665461. The reversal of 1006665447 is 7445666001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1006665447 - 2⁴ = 1006665431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006665427) 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, 167777572 + ... + 167777577.

It is an arithmetic number, because the mean of its divisors is an integer number (335555150).

Almost surely, 2^1006665447 is an apocalyptic number.

1006665447 is a deficient number, since it is larger than the sum of its proper divisors (335555153).

1006665447 is an equidigital number, since it uses as much as digits as its factorization.

1006665447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335555152.

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

The square root of 1006665447 is about 31727.9915374421. The cubic root of 1006665447 is about 1002.2168974008.

The spelling of 1006665447 in words is "one billion, six million, six hundred sixty-five thousand, four hundred forty-seven".