6666260139 has 72 divisors (see below), whose sum is σ = 12123471360. Its totient is φ = 3455131680.

The previous prime is 6666260123. The next prime is 6666260171. The reversal of 6666260139 is 9310626666.

It is not a de Polignac number, because 6666260139 - 2⁴ = 6666260123 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6666260094 and 6666260103.

It is not an unprimeable number, because it can be changed into a prime (6666260339) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5022894 + ... + 5024220.

Almost surely, 2^6666260139 is an apocalyptic number.

6666260139 is a deficient number, since it is larger than the sum of its proper divisors (5457211221).

6666260139 is a wasteful number, since it uses less digits than its factorization.

6666260139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 6666260139 is about 81647.1685914460. The cubic root of 6666260139 is about 1882.0338012663.

The spelling of 6666260139 in words is "six billion, six hundred sixty-six million, two hundred sixty thousand, one hundred thirty-nine".