6663699 has 36 divisors (see below), whose sum is σ = 11649456. Its totient is φ = 3595104.

The previous prime is 6663673. The next prime is 6663731. The reversal of 6663699 is 9963666.

It is a de Polignac number, because none of the positive numbers 2^k-6663699 is a prime.

6663699 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6663299) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22597 + ... + 22889.

It is an arithmetic number, because the mean of its divisors is an integer number (323596).

Almost surely, 2^6663699 is an apocalyptic number.

6663699 is a deficient number, since it is larger than the sum of its proper divisors (4985757).

6663699 is a wasteful number, since it uses less digits than its factorization.

6663699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 322 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 6663699 is about 2581.4141473231. The cubic root of 6663699 is about 188.1792748188.

The spelling of 6663699 in words is "six million, six hundred sixty-three thousand, six hundred ninety-nine".