6666880940 has 24 divisors (see below), whose sum is σ = 14008564752. Its totient is φ = 2665206720.

The previous prime is 6666880937. The next prime is 6666880943. The reversal of 6666880940 is 490886666.

It is an interprime number because it is at equal distance from previous prime (6666880937) and next prime (6666880943).

It is not an unprimeable number, because it can be changed into a prime (6666880943) 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, 60914 + ... + 130553.

It is an arithmetic number, because the mean of its divisors is an integer number (583690198).

Almost surely, 2^6666880940 is an apocalyptic number.

It is an amenable number.

6666880940 is an abundant number, since it is smaller than the sum of its proper divisors (7341683812).

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

6666880940 is a wasteful number, since it uses less digits than its factorization.

6666880940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193217 (or 193215 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 53.

The square root of 6666880940 is about 81650.9702330597. The cubic root of 6666880940 is about 1882.0922214387.

The spelling of 6666880940 in words is "six billion, six hundred sixty-six million, eight hundred eighty thousand, nine hundred forty".