6666260651 has 4 divisors (see below), whose sum is σ = 6808096032. Its totient is φ = 6524425272.

The previous prime is 6666260639. The next prime is 6666260687. The reversal of 6666260651 is 1560626666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6666260651 - 2¹⁰ = 6666259627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666260611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70917620 + ... + 70917713.

It is an arithmetic number, because the mean of its divisors is an integer number (1702024008).

Almost surely, 2^6666260651 is an apocalyptic number.

6666260651 is a deficient number, since it is larger than the sum of its proper divisors (141835381).

6666260651 is a wasteful number, since it uses less digits than its factorization.

6666260651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141835380.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 6666260651 is about 81647.1717268884. The cubic root of 6666260651 is about 1882.0338494493.

The spelling of 6666260651 in words is "six billion, six hundred sixty-six million, two hundred sixty thousand, six hundred fifty-one".