667289616 has 160 divisors (see below), whose sum is σ = 2083676160. Its totient is φ = 179891712.

The previous prime is 667289551. The next prime is 667289617. The reversal of 667289616 is 616982766.

It is not an unprimeable number, because it can be changed into a prime (667289617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609966 + ... + 611058.

It is an arithmetic number, because the mean of its divisors is an integer number (13022976).

Almost surely, 2^667289616 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 667289616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041838080).

667289616 is an abundant number, since it is smaller than the sum of its proper divisors (1416386544).

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

667289616 is a wasteful number, since it uses less digits than its factorization.

667289616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1207 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 667289616 is about 25831.9495199259. The cubic root of 667289616 is about 873.8524782126.

The spelling of 667289616 in words is "six hundred sixty-seven million, two hundred eighty-nine thousand, six hundred sixteen".