6688693 has 16 divisors (see below), whose sum is σ = 7603200. Its totient is φ = 5831280.

The previous prime is 6688691. The next prime is 6688723. The reversal of 6688693 is 3968866.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6688693 - 2¹ = 6688691 is a prime.

It is a super-2 number, since 2×6688693² = 89477228096498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37278 + ... + 37456.

It is an arithmetic number, because the mean of its divisors is an integer number (475200).

Almost surely, 2^6688693 is an apocalyptic number.

It is an amenable number.

6688693 is a deficient number, since it is larger than the sum of its proper divisors (914507).

6688693 is a wasteful number, since it uses less digits than its factorization.

6688693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its digits is 373248, while the sum is 46.

The square root of 6688693 is about 2586.2507612372. The cubic root of 6688693 is about 188.4142536506.

It can be divided in two parts, 6688 and 693, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6688693 in words is "six million, six hundred eighty-eight thousand, six hundred ninety-three".