6697665 has 36 divisors (see below), whose sum is σ = 12620244. Its totient is φ = 3266496.

The previous prime is 6697661. The next prime is 6697667. The reversal of 6697665 is 5667966.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 5049009 = 1284^2 + 2247^2 .

It is not a de Polignac number, because 6697665 - 2² = 6697661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6697665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6697661) 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, 62542 + ... + 62648.

Almost surely, 2^6697665 is an apocalyptic number.

6697665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6697665 is a deficient number, since it is larger than the sum of its proper divisors (5922579).

6697665 is a wasteful number, since it uses less digits than its factorization.

6697665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 128 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 6697665 is about 2587.9847372038. The cubic root of 6697665 is about 188.4984603063.

The spelling of 6697665 in words is "six million, six hundred ninety-seven thousand, six hundred sixty-five".