66769272 has 80 divisors (see below), whose sum is σ = 188440560. Its totient is φ = 22087296.

The previous prime is 66769237. The next prime is 66769273. The reversal of 66769272 is 27296766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66769273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107908 + ... + 108524.

It is an arithmetic number, because the mean of its divisors is an integer number (2355507).

Almost surely, 2^66769272 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 66769272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94220280).

66769272 is an abundant number, since it is smaller than the sum of its proper divisors (121671288).

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

66769272 is a wasteful number, since it uses less digits than its factorization.

66769272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 789 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 66769272 is about 8171.2466613118. The cubic root of 66769272 is about 405.6880485295.

The spelling of 66769272 in words is "sixty-six million, seven hundred sixty-nine thousand, two hundred seventy-two".