65722909 has 8 divisors (see below), whose sum is σ = 75506688. Its totient is φ = 56037840.

The previous prime is 65722897. The next prime is 65722933. The reversal of 65722909 is 90922756.

It is a happy number.

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 65722909 - 2⁷ = 65722781 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 (65722939) 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, 23242 + ... + 25915.

It is an arithmetic number, because the mean of its divisors is an integer number (9438336).

Almost surely, 2^65722909 is an apocalyptic number.

It is an amenable number.

65722909 is a deficient number, since it is larger than the sum of its proper divisors (9783779).

65722909 is a wasteful number, since it uses less digits than its factorization.

65722909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49355.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 65722909 is about 8106.9666953800. The cubic root of 65722909 is about 403.5576576202.

The spelling of 65722909 in words is "sixty-five million, seven hundred twenty-two thousand, nine hundred nine".