6687011898 has 48 divisors (see below), whose sum is σ = 16565230656. Its totient is φ = 1909776960.

The previous prime is 6687011879. The next prime is 6687011921. The reversal of 6687011898 is 8981107866.

It is a super-2 number, since 2×6687011898² = 89432256247987124808, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334390 + ... + 353822.

It is an arithmetic number, because the mean of its divisors is an integer number (345108972).

Almost surely, 2^6687011898 is an apocalyptic number.

6687011898 is an abundant number, since it is smaller than the sum of its proper divisors (9878218758).

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

6687011898 is a wasteful number, since it uses less digits than its factorization.

6687011898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22179 (or 22176 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 6687011898 is about 81774.1517718160. The cubic root of 6687011898 is about 1883.9846730196.

The spelling of 6687011898 in words is "six billion, six hundred eighty-seven million, eleven thousand, eight hundred ninety-eight".