65654321 has 8 divisors (see below), whose sum is σ = 66679200. Its totient is φ = 64636000.

The previous prime is 65654299. The next prime is 65654327. The reversal of 65654321 is 12345656.

65654321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 65654321 - 2⁶ = 65654257 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65654327) 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, 20870 + ... + 23808.

It is an arithmetic number, because the mean of its divisors is an integer number (8334900).

Almost surely, 2^65654321 is an apocalyptic number.

It is an amenable number.

65654321 is a deficient number, since it is larger than the sum of its proper divisors (1024879).

65654321 is a wasteful number, since it uses less digits than its factorization.

65654321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279.

The product of its digits is 21600, while the sum is 32.

The square root of 65654321 is about 8102.7354023194. The cubic root of 65654321 is about 403.4172253760.

Adding to 65654321 its reverse (12345656), we get a palindrome (77999977).

The spelling of 65654321 in words is "sixty-five million, six hundred fifty-four thousand, three hundred twenty-one".