668466210560 has 72 divisors (see below), whose sum is σ = 1610773922016. Its totient is φ = 265785282560.

The previous prime is 668466210553. The next prime is 668466210569. The reversal of 668466210560 is 65012664866.

It is a junction number, because it is equal to n+sod(n) for n = 668466210499 and 668466210508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668466210569) 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, 1349831 + ... + 1777350.

It is an arithmetic number, because the mean of its divisors is an integer number (22371860028).

Almost surely, 2^668466210560 is an apocalyptic number.

It is an amenable number.

668466210560 is an abundant number, since it is smaller than the sum of its proper divisors (942307711456).

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

668466210560 is a wasteful number, since it uses less digits than its factorization.

668466210560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127369 (or 3127355 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 668466210560 in words is "six hundred sixty-eight billion, four hundred sixty-six million, two hundred ten thousand, five hundred sixty".