6666514655 has 4 divisors (see below), whose sum is σ = 7999817592. Its totient is φ = 5333211720.

The previous prime is 6666514633. The next prime is 6666514727. The reversal of 6666514655 is 5564156666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5564156666 = 2 ⋅2782078333.

It is not a de Polignac number, because 6666514655 - 2¹⁰ = 6666513631 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 666651461 + ... + 666651470.

It is an arithmetic number, because the mean of its divisors is an integer number (1999954398).

Almost surely, 2^6666514655 is an apocalyptic number.

6666514655 is a deficient number, since it is larger than the sum of its proper divisors (1333302937).

6666514655 is a wasteful number, since it uses less digits than its factorization.

6666514655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333302936.

The product of its digits is 3888000, while the sum is 50.

The square root of 6666514655 is about 81648.7272099204. The cubic root of 6666514655 is about 1882.0577528078.

The spelling of 6666514655 in words is "six billion, six hundred sixty-six million, five hundred fourteen thousand, six hundred fifty-five".