667654416 has 120 divisors (see below), whose sum is σ = 2195234496. Its totient is φ = 186750720.

The previous prime is 667654399. The next prime is 667654417. The reversal of 667654416 is 614456766.

It is not an unprimeable number, because it can be changed into a prime (667654417) 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, 4381 + ... + 36803.

Almost surely, 2^667654416 is an apocalyptic number.

667654416 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667654416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097617248).

667654416 is an abundant number, since it is smaller than the sum of its proper divisors (1527580080).

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

667654416 is a wasteful number, since it uses less digits than its factorization.

667654416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32461 (or 32452 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 667654416 is about 25839.0095785423. The cubic root of 667654416 is about 874.0116910954.

The spelling of 667654416 in words is "six hundred sixty-seven million, six hundred fifty-four thousand, four hundred sixteen".