648666404666846 has 16 divisors (see below), whose sum is σ = 976913773854480. Its totient is φ = 323028811253760.

The previous prime is 648666404666827. The next prime is 648666404666869.

648666404666846 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78880136 + ... + 86714523.

It is an arithmetic number, because the mean of its divisors is an integer number (61057110865905).

Almost surely, 2^{648666404666846} is an apocalyptic number.

648666404666846 is a deficient number, since it is larger than the sum of its proper divisors (328247369187634).

648666404666846 is a wasteful number, since it uses less digits than its factorization.

648666404666846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165602539.

The product of its (nonzero) digits is 27518828544, while the sum is 80.

The spelling of 648666404666846 in words is "six hundred forty-eight trillion, six hundred sixty-six billion, four hundred four million, six hundred sixty-six thousand, eight hundred forty-six".