6651666600065 has 16 divisors (see below), whose sum is σ = 8337397644288. Its totient is φ = 5084865589056.

The previous prime is 6651666600023. The next prime is 6651666600071. The reversal of 6651666600065 is 5600066661566.

It is a cyclic number.

It is not a de Polignac number, because 6651666600065 - 2²⁴ = 6651649822849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28892657 + ... + 29121966.

It is an arithmetic number, because the mean of its divisors is an integer number (521087352768).

Almost surely, 2^{6651666600065} is an apocalyptic number.

It is an amenable number.

6651666600065 is a deficient number, since it is larger than the sum of its proper divisors (1685731044223).

6651666600065 is a wasteful number, since it uses less digits than its factorization.

6651666600065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58015648.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 6651666600065 in words is "six trillion, six hundred fifty-one billion, six hundred sixty-six million, six hundred thousand, sixty-five".