6680690 has 8 divisors (see below), whose sum is σ = 12025260. Its totient is φ = 2672272.

The previous prime is 6680689. The next prime is 6680699. The reversal of 6680690 is 960866.

It can be written as a sum of positive squares in 2 ways, for example, as 6285049 + 395641 = 2507^2 + 629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6680690² = 89263237752200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6680690.

It is not an unprimeable number, because it can be changed into a prime (6680699) 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, 334025 + ... + 334044.

Almost surely, 2^6680690 is an apocalyptic number.

6680690 is a deficient number, since it is larger than the sum of its proper divisors (5344570).

6680690 is a wasteful number, since it uses less digits than its factorization.

6680690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668076.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 6680690 is about 2584.7030777248. The cubic root of 6680690 is about 188.3390779741.

The spelling of 6680690 in words is "six million, six hundred eighty thousand, six hundred ninety".