667198896 has 120 divisors (see below), whose sum is σ = 2159330544. Its totient is φ = 175956480.

The previous prime is 667198891. The next prime is 667198921. The reversal of 667198896 is 698891766.

It is not an unprimeable number, because it can be changed into a prime (667198891) 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, 19666 + ... + 41486.

Almost surely, 2^667198896 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 667198896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079665272).

667198896 is an abundant number, since it is smaller than the sum of its proper divisors (1492131648).

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

667198896 is a wasteful number, since it uses less digits than its factorization.

667198896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859 (or 21846 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 60.

The square root of 667198896 is about 25830.1934952102. The cubic root of 667198896 is about 873.8128754735.

The spelling of 667198896 in words is "six hundred sixty-seven million, one hundred ninety-eight thousand, eight hundred ninety-six".