6690804505 has 24 divisors (see below), whose sum is σ = 10085979456. Its totient is φ = 4170888480.

The previous prime is 6690804503. The next prime is 6690804511. The reversal of 6690804505 is 5054080966.

It is not a de Polignac number, because 6690804505 - 2¹ = 6690804503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6690804503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 785707 + ... + 794176.

It is an arithmetic number, because the mean of its divisors is an integer number (420249144).

Almost surely, 2^6690804505 is an apocalyptic number.

It is an amenable number.

6690804505 is a deficient number, since it is larger than the sum of its proper divisors (3395174951).

6690804505 is a wasteful number, since it uses less digits than its factorization.

6690804505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579917 (or 1579906 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 6690804505 is about 81797.3380068080. The cubic root of 6690804505 is about 1884.3407794124.

The spelling of 6690804505 in words is "six billion, six hundred ninety million, eight hundred four thousand, five hundred five".