664841554016 has 24 divisors (see below), whose sum is σ = 1308955629240. Its totient is φ = 332408378368.

The previous prime is 664841554001. The next prime is 664841554021. The reversal of 664841554016 is 610455148466.

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, 516335 + ... + 1263441.

It is an arithmetic number, because the mean of its divisors is an integer number (54539817885).

Almost surely, 2^664841554016 is an apocalyptic number.

It is an amenable number.

664841554016 is a deficient number, since it is larger than the sum of its proper divisors (644114075224).

664841554016 is a wasteful number, since it uses less digits than its factorization.

664841554016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774926 (or 774918 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 664841554016 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred fifty-four thousand, sixteen".