6666740740 has 48 divisors (see below), whose sum is σ = 16171311744. Its totient is φ = 2281664000.

The previous prime is 6666740699. The next prime is 6666740749. The reversal of 6666740740 is 470476666.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6666740749) 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, 887536 + ... + 895015.

It is an arithmetic number, because the mean of its divisors is an integer number (336902328).

Almost surely, 2^6666740740 is an apocalyptic number.

It is an amenable number.

6666740740 is an abundant number, since it is smaller than the sum of its proper divisors (9504571004).

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

6666740740 is a wasteful number, since it uses less digits than its factorization.

6666740740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782588 (or 1782586 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The square root of 6666740740 is about 81650.1116961881. Note that the first 3 decimals coincide. The cubic root of 6666740740 is about 1882.0790283038.

The spelling of 6666740740 in words is "six billion, six hundred sixty-six million, seven hundred forty thousand, seven hundred forty".