667210565056 has 168 divisors, whose sum is σ = 1632136791600. Its totient is φ = 269351792640.

The previous prime is 667210565053. The next prime is 667210565071. The reversal of 667210565056 is 650565012766.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667210565053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3639235 + ... + 3818173.

It is an arithmetic number, because the mean of its divisors is an integer number (9715099950).

Almost surely, 2^667210565056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667210565056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816068395800).

667210565056 is an abundant number, since it is smaller than the sum of its proper divisors (964926226544).

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

667210565056 is a wasteful number, since it uses less digits than its factorization.

667210565056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179035 (or 179018 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 667210565056 in words is "six hundred sixty-seven billion, two hundred ten million, five hundred sixty-five thousand, fifty-six".