6690055 has 8 divisors (see below), whose sum is σ = 8082144. Its totient is φ = 5316000.

The previous prime is 6690029. The next prime is 6690059. The reversal of 6690055 is 5500966.

It is a happy number.

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

It is not a de Polignac number, because 6690055 - 2¹⁷ = 6558983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6689999 and 6690026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3676 + ... + 5185.

It is an arithmetic number, because the mean of its divisors is an integer number (1010268).

Almost surely, 2^6690055 is an apocalyptic number.

6690055 is a deficient number, since it is larger than the sum of its proper divisors (1392089).

6690055 is a wasteful number, since it uses less digits than its factorization.

6690055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 6690055 is about 2586.5140633679. The cubic root of 6690055 is about 188.4270415399.

The spelling of 6690055 in words is "six million, six hundred ninety thousand, fifty-five".