66713382 has 80 divisors (see below), whose sum is σ = 156461712. Its totient is φ = 21228480.

The previous prime is 66713371. The next prime is 66713401. The reversal of 66713382 is 28331766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 424848 + ... + 425004.

Almost surely, 2^66713382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66713382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78230856).

66713382 is an abundant number, since it is smaller than the sum of its proper divisors (89748330).

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

66713382 is a wasteful number, since it uses less digits than its factorization.

66713382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 266 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 66713382 is about 8167.8260265508. The cubic root of 66713382 is about 405.5748216225.

The spelling of 66713382 in words is "sixty-six million, seven hundred thirteen thousand, three hundred eighty-two".