65709660 has 24 divisors (see below), whose sum is σ = 183987216. Its totient is φ = 17522560.

The previous prime is 65709629. The next prime is 65709661. The reversal of 65709660 is 6690756.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65709661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547521 + ... + 547640.

It is an arithmetic number, because the mean of its divisors is an integer number (7666134).

Almost surely, 2^65709660 is an apocalyptic number.

65709660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65709660 is an abundant number, since it is smaller than the sum of its proper divisors (118277556).

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

65709660 is a wasteful number, since it uses less digits than its factorization.

65709660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095173 (or 1095171 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 65709660 is about 8106.1495174960. The cubic root of 65709660 is about 403.5305382346.

The spelling of 65709660 in words is "sixty-five million, seven hundred nine thousand, six hundred sixty".