6687535420 has 24 divisors (see below), whose sum is σ = 14386358448. Its totient is φ = 2609769600.

The previous prime is 6687535409. The next prime is 6687535427. The reversal of 6687535420 is 245357866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687535427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4076946 + ... + 4078585.

It is an arithmetic number, because the mean of its divisors is an integer number (599431602).

Almost surely, 2^6687535420 is an apocalyptic number.

It is an amenable number.

6687535420 is an abundant number, since it is smaller than the sum of its proper divisors (7698823028).

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

6687535420 is a wasteful number, since it uses less digits than its factorization.

6687535420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155581 (or 8155579 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The square root of 6687535420 is about 81777.3527328930. The cubic root of 6687535420 is about 1884.0338370658.

The spelling of 6687535420 in words is "six billion, six hundred eighty-seven million, five hundred thirty-five thousand, four hundred twenty".