6690045 has 8 divisors (see below), whose sum is σ = 10704096. Its totient is φ = 3568016.

The previous prime is 6690029. The next prime is 6690059. The reversal of 6690045 is 5400966.

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

It is a cyclic number.

It is not a de Polignac number, because 6690045 - 2⁴ = 6690029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6689994 and 6690021.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 222987 + ... + 223016.

It is an arithmetic number, because the mean of its divisors is an integer number (1338012).

Almost surely, 2^6690045 is an apocalyptic number.

It is an amenable number.

6690045 is a deficient number, since it is larger than the sum of its proper divisors (4014051).

6690045 is a wasteful number, since it uses less digits than its factorization.

6690045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446011.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 6690045 is about 2586.5121302635. The cubic root of 6690045 is about 188.4269476557.

The spelling of 6690045 in words is "six million, six hundred ninety thousand, forty-five".