6997668 has 12 divisors (see below), whose sum is σ = 16327920. Its totient is φ = 2332552.

The previous prime is 6997663. The next prime is 6997687. The reversal of 6997668 is 8667996.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 6997668.

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 3 ways as a sum of consecutive naturals, for example, 291558 + ... + 291581.

It is an arithmetic number, because the mean of its divisors is an integer number (1360660).

Almost surely, 2^6997668 is an apocalyptic number.

It is an amenable number.

6997668 is an abundant number, since it is smaller than the sum of its proper divisors (9330252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6997668 is a wasteful number, since it uses less digits than its factorization.

6997668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583146 (or 583144 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 6997668 is about 2645.3105677784. The cubic root of 6997668 is about 191.2718732725.

The spelling of 6997668 in words is "six million, nine hundred ninety-seven thousand, six hundred sixty-eight".