65722099 has 4 divisors (see below), whose sum is σ = 65754136. Its totient is φ = 65690064.

The previous prime is 65722087. The next prime is 65722123. The reversal of 65722099 is 99022756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65722099 - 2¹⁵ = 65689331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65722009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12714 + ... + 17119.

It is an arithmetic number, because the mean of its divisors is an integer number (16438534).

Almost surely, 2^65722099 is an apocalyptic number.

65722099 is a deficient number, since it is larger than the sum of its proper divisors (32037).

65722099 is a wasteful number, since it uses less digits than its factorization.

65722099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32036.

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

The square root of 65722099 is about 8106.9167381934. The cubic root of 65722099 is about 403.5559997353. Note that the first 3 decimals are identical.

The spelling of 65722099 in words is "sixty-five million, seven hundred twenty-two thousand, ninety-nine".