66371272 has 32 divisors (see below), whose sum is σ = 137797920. Its totient is φ = 29715840.

The previous prime is 66371269. The next prime is 66371273. The reversal of 66371272 is 27217366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66371273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268 + ... + 11524.

It is an arithmetic number, because the mean of its divisors is an integer number (4306185).

Almost surely, 2^66371272 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 66371272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68898960).

66371272 is an abundant number, since it is smaller than the sum of its proper divisors (71426648).

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

66371272 is a wasteful number, since it uses less digits than its factorization.

66371272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11341 (or 11337 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 66371272 is about 8146.8565717091. The cubic root of 66371272 is about 404.8803629760.

The spelling of 66371272 in words is "sixty-six million, three hundred seventy-one thousand, two hundred seventy-two".