6666655439376 has 120 divisors (see below), whose sum is σ = 18884776921920. Its totient is φ = 2195140923648.

The previous prime is 6666655439363. The next prime is 6666655439419. The reversal of 6666655439376 is 6739345566666.

It is a super-2 number, since 2×6666655439376² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96406125 + ... + 96475251.

It is an arithmetic number, because the mean of its divisors is an integer number (157373141016).

Almost surely, 2^{6666655439376} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666655439376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9442388460960).

6666655439376 is an abundant number, since it is smaller than the sum of its proper divisors (12218121482544).

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

6666655439376 is a wasteful number, since it uses less digits than its factorization.

6666655439376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77293 (or 77284 counting only the distinct ones).

The product of its digits is 2645395200, while the sum is 72.

The spelling of 6666655439376 in words is "six trillion, six hundred sixty-six billion, six hundred fifty-five million, four hundred thirty-nine thousand, three hundred seventy-six".