6997665 has 16 divisors (see below), whose sum is σ = 11232000. Its totient is φ = 3720192.

The previous prime is 6997663. The next prime is 6997687. The reversal of 6997665 is 5667996.

It is not a de Polignac number, because 6997665 - 2¹ = 6997663 is a prime.

6997665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6997663) by changing a digit.

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, 6216 + ... + 7254.

It is an arithmetic number, because the mean of its divisors is an integer number (702000).

Almost surely, 2^6997665 is an apocalyptic number.

It is an amenable number.

6997665 is a deficient number, since it is larger than the sum of its proper divisors (4234335).

6997665 is a wasteful number, since it uses less digits than its factorization.

6997665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496.

The product of its digits is 612360, while the sum is 48.

The square root of 6997665 is about 2645.3100007372. The cubic root of 6997665 is about 191.2718459389.

The spelling of 6997665 in words is "six million, nine hundred ninety-seven thousand, six hundred sixty-five".