666675516 has 96 divisors (see below), whose sum is σ = 1773370368. Its totient is φ = 193374720.

The previous prime is 666675473. The next prime is 666675521. The reversal of 666675516 is 615576666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253440 + ... + 256056.

It is an arithmetic number, because the mean of its divisors is an integer number (18472608).

Almost surely, 2^666675516 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 666675516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886685184).

666675516 is an abundant number, since it is smaller than the sum of its proper divisors (1106694852).

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

666675516 is a wasteful number, since it uses less digits than its factorization.

666675516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731 (or 2729 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 48.

The square root of 666675516 is about 25820.0603407506. The cubic root of 666675516 is about 873.5843300216.

The spelling of 666675516 in words is "six hundred sixty-six million, six hundred seventy-five thousand, five hundred sixteen".