654646666646456 has 48 divisors (see below), whose sum is σ = 1349210449217400. Its totient is φ = 297563108927040.

The previous prime is 654646666646407. The next prime is 654646666646471.

654646666646456 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77817650 + ... + 85818878.

Almost surely, 2^{654646666646456} is an apocalyptic number.

It is an amenable number.

654646666646456 is an abundant number, since it is smaller than the sum of its proper divisors (694563782570944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654646666646456 is a wasteful number, since it uses less digits than its factorization.

654646666646456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085780 (or 8085765 counting only the distinct ones).

The product of its digits is 64497254400, while the sum is 80.

The spelling of 654646666646456 in words is "six hundred fifty-four trillion, six hundred forty-six billion, six hundred sixty-six million, six hundred forty-six thousand, four hundred fifty-six".