666178096 has 40 divisors (see below), whose sum is σ = 1337914368. Its totient is φ = 321000000.

The previous prime is 666178091. The next prime is 666178129. The reversal of 666178096 is 690871666.

It is not an unprimeable number, because it can be changed into a prime (666178091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121821 + ... + 127171.

Almost surely, 2^666178096 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 666178096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668957184).

666178096 is an abundant number, since it is smaller than the sum of its proper divisors (671736272).

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

666178096 is a wasteful number, since it uses less digits than its factorization.

666178096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641 (or 5635 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 666178096 is about 25810.4261103919. The cubic root of 666178096 is about 873.3670096888.

The spelling of 666178096 in words is "six hundred sixty-six million, one hundred seventy-eight thousand, ninety-six".