6690653 has 4 divisors (see below), whose sum is σ = 6696000. Its totient is φ = 6685308.

The previous prime is 6690647. The next prime is 6690689. The reversal of 6690653 is 3560966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3560966 = 2 ⋅1780483.

It is a cyclic number.

It is not a de Polignac number, because 6690653 - 2¹⁰ = 6689629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690623) 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 3 ways as a sum of consecutive naturals, for example, 326 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (1674000).

Almost surely, 2^6690653 is an apocalyptic number.

It is an amenable number.

6690653 is a deficient number, since it is larger than the sum of its proper divisors (5347).

6690653 is a wasteful number, since it uses less digits than its factorization.

6690653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5346.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 6690653 is about 2586.6296603882. The cubic root of 6690653 is about 188.4326556449.

The spelling of 6690653 in words is "six million, six hundred ninety thousand, six hundred fifty-three".