6690617 has 4 divisors (see below), whose sum is σ = 6749940. Its totient is φ = 6631296.

The previous prime is 6690611. The next prime is 6690623. The reversal of 6690617 is 7160966.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6690611) and next prime (6690623).

It can be written as a sum of positive squares in 2 ways, for example, as 1510441 + 5180176 = 1229^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690617 - 2⁴ = 6690601 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6690611) 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, 29492 + ... + 29717.

It is an arithmetic number, because the mean of its divisors is an integer number (1687485).

Almost surely, 2^6690617 is an apocalyptic number.

It is an amenable number.

6690617 is a deficient number, since it is larger than the sum of its proper divisors (59323).

6690617 is a wasteful number, since it uses less digits than its factorization.

6690617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59322.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 6690617 is about 2586.6227015164. The cubic root of 6690617 is about 188.4323176815.

The spelling of 6690617 in words is "six million, six hundred ninety thousand, six hundred seventeen".