6690255605 has 8 divisors (see below), whose sum is σ = 8758152864. Its totient is φ = 4865640400.

The previous prime is 6690255589. The next prime is 6690255697. The reversal of 6690255605 is 5065520966.

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

It is not a de Polignac number, because 6690255605 - 2⁴ = 6690255589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60820451 + ... + 60820560.

It is an arithmetic number, because the mean of its divisors is an integer number (1094769108).

Almost surely, 2^6690255605 is an apocalyptic number.

It is an amenable number.

6690255605 is a deficient number, since it is larger than the sum of its proper divisors (2067897259).

6690255605 is a wasteful number, since it uses less digits than its factorization.

6690255605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121641027.

The product of its (nonzero) digits is 486000, while the sum is 44.

The square root of 6690255605 is about 81793.9826943278. The cubic root of 6690255605 is about 1884.2892488409.

The spelling of 6690255605 in words is "six billion, six hundred ninety million, two hundred fifty-five thousand, six hundred five".