66272668 has 72 divisors (see below), whose sum is σ = 150628352. Its totient is φ = 24948000.

The previous prime is 66272663. The next prime is 66272669. The reversal of 66272668 is 86627266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66272663) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 104713 + ... + 105343.

Almost surely, 2^66272668 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 66272668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75314176).

66272668 is an abundant number, since it is smaller than the sum of its proper divisors (84355684).

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

66272668 is a wasteful number, since it uses less digits than its factorization.

66272668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 682 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 66272668 is about 8140.8026631285. The cubic root of 66272668 is about 404.6797610750.

The spelling of 66272668 in words is "sixty-six million, two hundred seventy-two thousand, six hundred sixty-eight".