666164016 has 180 divisors, whose sum is σ = 2283317400. Its totient is φ = 180278784.

The previous prime is 666163969. The next prime is 666164047. The reversal of 666164016 is 610461666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 131580 + ... + 136548.

Almost surely, 2^666164016 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 666164016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141658700).

666164016 is an abundant number, since it is smaller than the sum of its proper divisors (1617153384).

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

666164016 is a wasteful number, since it uses less digits than its factorization.

666164016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016 (or 5000 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 666164016 is about 25810.1533509586. The cubic root of 666164016 is about 873.3608566325.

The spelling of 666164016 in words is "six hundred sixty-six million, one hundred sixty-four thousand, sixteen".