66667016 has 32 divisors (see below), whose sum is σ = 135874200. Its totient is φ = 30481920.

The previous prime is 66666983. The next prime is 66667037. The reversal of 66667016 is 61076666.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60684100 + 5982916 = 7790^2 + 2446^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8396 + ... + 14276.

Almost surely, 2^66667016 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 66667016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67937100).

66667016 is an abundant number, since it is smaller than the sum of its proper divisors (69207184).

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

66667016 is a wasteful number, since it uses less digits than its factorization.

66667016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009 (or 6005 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 66667016 is about 8164.9872014597. The cubic root of 66667016 is about 405.4808412756.

The spelling of 66667016 in words is "sixty-six million, six hundred sixty-seven thousand, sixteen".