65955421 has 24 divisors (see below), whose sum is σ = 81981504. Its totient is φ = 52778880.

The previous prime is 65955419. The next prime is 65955431. The reversal of 65955421 is 12455956.

It is not a de Polignac number, because 65955421 - 2¹ = 65955419 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65955401) 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 23 ways as a sum of consecutive naturals, for example, 47781 + ... + 49141.

It is an arithmetic number, because the mean of its divisors is an integer number (3415896).

Almost surely, 2^65955421 is an apocalyptic number.

It is an amenable number.

65955421 is a deficient number, since it is larger than the sum of its proper divisors (16026083).

65955421 is a wasteful number, since it uses less digits than its factorization.

65955421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441 (or 1434 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 65955421 is about 8121.2942933993. The cubic root of 65955421 is about 404.0329944788.

The spelling of 65955421 in words is "sixty-five million, nine hundred fifty-five thousand, four hundred twenty-one".