65660712 has 64 divisors (see below), whose sum is σ = 177744000. Its totient is φ = 20093184.

The previous prime is 65660711. The next prime is 65660731. The reversal of 65660712 is 21706656.

It is a super-2 number, since 2×65660712² = 8622658200693888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65660711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70989 + ... + 71907.

It is an arithmetic number, because the mean of its divisors is an integer number (2777250).

Almost surely, 2^65660712 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 65660712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88872000).

65660712 is an abundant number, since it is smaller than the sum of its proper divisors (112083288).

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

65660712 is a wasteful number, since it uses less digits than its factorization.

65660712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 65660712 is about 8103.1297657140. The cubic root of 65660712 is about 403.4303149223.

The spelling of 65660712 in words is "sixty-five million, six hundred sixty thousand, seven hundred twelve".