6836661405 has 144 divisors (see below), whose sum is σ = 14205020544. Its totient is φ = 2979325440.

The previous prime is 6836661397. The next prime is 6836661409. The reversal of 6836661405 is 5041666386.

It is not a de Polignac number, because 6836661405 - 2³ = 6836661397 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 (6836661409) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 34703767 + ... + 34703963.

It is an arithmetic number, because the mean of its divisors is an integer number (98645976).

Almost surely, 2^6836661405 is an apocalyptic number.

It is an amenable number.

6836661405 is an abundant number, since it is smaller than the sum of its proper divisors (7368359139).

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

6836661405 is a wasteful number, since it uses less digits than its factorization.

6836661405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6836661405 is about 82684.1061208259. The cubic root of 6836661405 is about 1897.9350978787.

The spelling of 6836661405 in words is "six billion, eight hundred thirty-six million, six hundred sixty-one thousand, four hundred five".