6570215671666 has 16 divisors (see below), whose sum is σ = 10283988017664. Its totient is φ = 3142224448704.

The previous prime is 6570215671661. The next prime is 6570215671667. The reversal of 6570215671666 is 6661765120756.

It is a self number, because there is not a number n which added to its sum of digits gives 6570215671666.

It is not an unprimeable number, because it can be changed into a prime (6570215671661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654591 + ... + 3984733.

It is an arithmetic number, because the mean of its divisors is an integer number (642749251104).

Almost surely, 2^{6570215671666} is an apocalyptic number.

6570215671666 is a deficient number, since it is larger than the sum of its proper divisors (3713772345998).

6570215671666 is a wasteful number, since it uses less digits than its factorization.

6570215671666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391465.

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 6570215671666 in words is "six trillion, five hundred seventy billion, two hundred fifteen million, six hundred seventy-one thousand, six hundred sixty-six".