65996723 has 4 divisors (see below), whose sum is σ = 71073408. Its totient is φ = 60920040.

The previous prime is 65996717. The next prime is 65996731. The reversal of 65996723 is 32769956.

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 65996723 - 2⁶ = 65996659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65996753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538323 + ... + 2538348.

It is an arithmetic number, because the mean of its divisors is an integer number (17768352).

Almost surely, 2^65996723 is an apocalyptic number.

65996723 is a deficient number, since it is larger than the sum of its proper divisors (5076685).

65996723 is a wasteful number, since it uses less digits than its factorization.

65996723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076684.

The product of its digits is 612360, while the sum is 47.

The square root of 65996723 is about 8123.8367167244. The cubic root of 65996723 is about 404.1173134952.

The spelling of 65996723 in words is "sixty-five million, nine hundred ninety-six thousand, seven hundred twenty-three".