6686644027 has 16 divisors (see below), whose sum is σ = 8208256000. Its totient is φ = 5429750760.

The previous prime is 6686644021. The next prime is 6686644049. The reversal of 6686644027 is 7204466866.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-6686644027 is a prime.

It is a super-2 number, since 2×6686644027² = 89422416687629553458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (6686644021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506499 + ... + 519532.

It is an arithmetic number, because the mean of its divisors is an integer number (513016000).

Almost surely, 2^6686644027 is an apocalyptic number.

6686644027 is a deficient number, since it is larger than the sum of its proper divisors (1521611973).

6686644027 is a wasteful number, since it uses less digits than its factorization.

6686644027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026071 (or 1026057 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 49.

The square root of 6686644027 is about 81771.9024298689. The cubic root of 6686644027 is about 1883.9501246520.

The spelling of 6686644027 in words is "six billion, six hundred eighty-six million, six hundred forty-four thousand, twenty-seven".