6686121488 has 40 divisors (see below), whose sum is σ = 14008246272. Its totient is φ = 3079459328.

The previous prime is 6686121479. The next prime is 6686121499. The reversal of 6686121488 is 8841216866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248720 + ... + 274287.

Almost surely, 2^6686121488 is an apocalyptic number.

6686121488 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6686121488 is an abundant number, since it is smaller than the sum of its proper divisors (7322124784).

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

6686121488 is a wasteful number, since it uses less digits than its factorization.

6686121488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523079 (or 523073 counting only the distinct ones).

The product of its digits is 884736, while the sum is 50.

The square root of 6686121488 is about 81768.7072662886. The cubic root of 6686121488 is about 1883.9010485607.

The spelling of 6686121488 in words is "six billion, six hundred eighty-six million, one hundred twenty-one thousand, four hundred eighty-eight".