6699132405 has 64 divisors (see below), whose sum is σ = 13621985280. Its totient is φ = 3059975232.

The previous prime is 6699132389. The next prime is 6699132409. The reversal of 6699132405 is 5042319966.

6699132405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6699132405 - 2⁴ = 6699132389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699132409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1686732 + ... + 1690698.

It is an arithmetic number, because the mean of its divisors is an integer number (212843520).

Almost surely, 2^6699132405 is an apocalyptic number.

It is an amenable number.

6699132405 is an abundant number, since it is smaller than the sum of its proper divisors (6922852875).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6699132405 is a wasteful number, since it uses less digits than its factorization.

6699132405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775 (or 5769 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 6699132405 is about 81848.2278671933. The cubic root of 6699132405 is about 1885.1222547101.

The spelling of 6699132405 in words is "six billion, six hundred ninety-nine million, one hundred thirty-two thousand, four hundred five".