66714560 has 84 divisors (see below), whose sum is σ = 174720504. Its totient is φ = 24245760.

The previous prime is 66714539. The next prime is 66714569. The reversal of 66714560 is 6541766.

It is a self number, because there is not a number n which added to its sum of digits gives 66714560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66714569) 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 11 ways as a sum of consecutive naturals, for example, 37859 + ... + 39581.

It is an arithmetic number, because the mean of its divisors is an integer number (2080006).

Almost surely, 2^66714560 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 66714560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87360252).

66714560 is an abundant number, since it is smaller than the sum of its proper divisors (108005944).

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

66714560 is a wasteful number, since it uses less digits than its factorization.

66714560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762 (or 1741 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66714560 is about 8167.8981384442. The cubic root of 66714560 is about 405.5772087714.

The spelling of 66714560 in words is "sixty-six million, seven hundred fourteen thousand, five hundred sixty".