6666741408 has 24 divisors (see below), whose sum is σ = 17500196448. Its totient is φ = 2222247104.

The previous prime is 6666741373. The next prime is 6666741427. The reversal of 6666741408 is 8041476666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×6666741408² = 88890882002283644928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34722516 + ... + 34722707.

It is an arithmetic number, because the mean of its divisors is an integer number (729174852).

Almost surely, 2^6666741408 is an apocalyptic number.

It is an amenable number.

6666741408 is an abundant number, since it is smaller than the sum of its proper divisors (10833455040).

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

6666741408 is a wasteful number, since it uses less digits than its factorization.

6666741408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69445236 (or 69445228 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 6666741408 is about 81650.1157868132. The cubic root of 6666741408 is about 1882.0790911645.

The spelling of 6666741408 in words is "six billion, six hundred sixty-six million, seven hundred forty-one thousand, four hundred eight".