65407709 has 8 divisors (see below), whose sum is σ = 69495840. Its totient is φ = 61384176.

The previous prime is 65407703. The next prime is 65407729. The reversal of 65407709 is 90770456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65407709 - 2²⁰ = 64359133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65407703) 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, 14054 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (8686980).

Almost surely, 2^65407709 is an apocalyptic number.

It is an amenable number.

65407709 is a deficient number, since it is larger than the sum of its proper divisors (4088131).

65407709 is a wasteful number, since it uses less digits than its factorization.

65407709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32299.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 65407709 is about 8087.5032612049. The cubic root of 65407709 is about 402.9114838218.

The spelling of 65407709 in words is "sixty-five million, four hundred seven thousand, seven hundred nine".