66095720 has 64 divisors (see below), whose sum is σ = 154967040. Its totient is φ = 25344000.

The previous prime is 66095707. The next prime is 66095749. The reversal of 66095720 is 2759066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187064 + ... + 187416.

It is an arithmetic number, because the mean of its divisors is an integer number (2421360).

Almost surely, 2^66095720 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 66095720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77483520).

66095720 is an abundant number, since it is smaller than the sum of its proper divisors (88871320).

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

66095720 is a wasteful number, since it uses less digits than its factorization.

66095720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 66095720 is about 8129.9274289504. The cubic root of 66095720 is about 404.3192751125.

The spelling of 66095720 in words is "sixty-six million, ninety-five thousand, seven hundred twenty".