65221877 has 8 divisors (see below), whose sum is σ = 78924096. Its totient is φ = 52615872.

The previous prime is 65221873. The next prime is 65221879. The reversal of 65221877 is 77812256.

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 65221877 - 2² = 65221873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65221877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221873) 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, 273923 + ... + 274160.

It is an arithmetic number, because the mean of its divisors is an integer number (9865512).

Almost surely, 2^65221877 is an apocalyptic number.

It is an amenable number.

65221877 is a deficient number, since it is larger than the sum of its proper divisors (13702219).

65221877 is a wasteful number, since it uses less digits than its factorization.

65221877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548107.

The product of its digits is 47040, while the sum is 38.

The square root of 65221877 is about 8076.0062530932. The cubic root of 65221877 is about 402.5295468453.

The spelling of 65221877 in words is "sixty-five million, two hundred twenty-one thousand, eight hundred seventy-seven".