6696891055405 has 16 divisors (see below), whose sum is σ = 8527942018800. Its totient is φ = 5031134789632.

The previous prime is 6696891055367. The next prime is 6696891055511. The reversal of 6696891055405 is 5045501986966.

6696891055405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 276804358884 + 6420086696521 = 526122^2 + 2533789^2 .

It is a cyclic number.

It is not a de Polignac number, because 6696891055405 - 2²⁷ = 6696756837677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87697864 + ... + 87774193.

It is an arithmetic number, because the mean of its divisors is an integer number (532996376175).

Almost surely, 2^{6696891055405} is an apocalyptic number.

It is an amenable number.

6696891055405 is a deficient number, since it is larger than the sum of its proper divisors (1831050963395).

6696891055405 is a wasteful number, since it uses less digits than its factorization.

6696891055405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175472528.

The product of its (nonzero) digits is 69984000, while the sum is 64.

The spelling of 6696891055405 in words is "six trillion, six hundred ninety-six billion, eight hundred ninety-one million, fifty-five thousand, four hundred five".