6668767680 has 56 divisors (see below), whose sum is σ = 21173340432. Its totient is φ = 1778337792.

The previous prime is 6668767661. The next prime is 6668767681. The reversal of 6668767680 is 867678666.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668767681) 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, 3472357 + ... + 3474276.

Almost surely, 2^6668767680 is an apocalyptic number.

6668767680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6668767680 is an abundant number, since it is smaller than the sum of its proper divisors (14504572752).

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

6668767680 is a wasteful number, since it uses less digits than its factorization.

6668767680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946653 (or 6946643 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The square root of 6668767680 is about 81662.5231057674. The cubic root of 6668767680 is about 1882.2697499202.

The spelling of 6668767680 in words is "six billion, six hundred sixty-eight million, seven hundred sixty-seven thousand, six hundred eighty".